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List of Freshwater Fishes reported from Malaysia
n = 651
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Table 1: 628 species currently present in the country/island (endemic, native, introduced, reintroduced);
Table 2: 10 species possibly present in the country/island (stray, questionable);
Table 3: 13 species demonstrated to be absent in the country/island (extirpated, not established, misidentification, error).
Table 4: 651 species reported from the country/island altogether.
Table : 651 .
     
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Family Species Author Info Occurrence Common names Abundance Max length Maturity Remark Photo
Cobitidae Acanthopsoides molobrion Siebert, 1991 Fr native   4.50 cm SL male/unsexed  Occurs in Malay Peninsula (Ref. 26580). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Cobitidae Acanthopsoides robertsi Siebert, 1991 Fr native   5.50 cm SL male/unsexed  Known from Sarawak, Borneo. Also Ref. 26580  No picture yet.
Cobitidae Acantopsis dialuzona Van Hasselt, 1823 Fr native   25.00 cm SL male/unsexed  Recorded from Danum valley, Kuamut headwaters (Ref. 34011) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 4832, 4835, 7050, 36654. 
Cobitidae Acantopsis octoactinotos Siebert, 1991 Fr native   9.60 cm SL male/unsexed  Recorded from Sabah (Ref. 84801). 
Soleidae Achiroides leucorhynchos Bleeker, 1851 Fr native  Sole (English), Lidah cerah (Malay), Sebelah (Malay)  8.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Akysidae Acrochordonichthys falcifer Ng & Ng, 2001 Fr native   9.21 cm SL male/unsexed  Known only from the Kinabatangan and Segama River drainages, and possibly from the Kayan River drainage in northeastern Borneo (Ref. 37794).  No picture yet.
Akysidae Acrochordonichthys pachyderma Vaillant, 1902 Fr native   14.48 cm SL male/unsexed  Known from the Kinabatangan River drainages (Ref. 37794).  No picture yet.
Akysidae Acrochordonichthys rugosus (Bleeker, 1846) Fr native   11.00 cm SL male/unsexed  Known from the Rajang River drainages in Borneo and the Bernam, Terengganu (Ref. 37794). Recorded from the Danum Valley (Ref. 34011). Also Ref. 7050, 57780. 
Akysidae Acrochordonichthys septentrionalis Ng & Ng, 2001 Fr native   10.13 cm SL male/unsexed  Known from Pahang River drainage and may be found in the Bernam River drainage in Peninsular Malaysia (Ref. 37794).  No picture yet.
Akysidae Akysis hendricksoni Alfred, 1966 Fr native   4.87 cm SL male/unsexed  Known from northeastern and western Peninsular Malaysia (Ref. 30226). Trengganu River at Kuala Brang, Trengganu, Malaya (type locality) (Ref. 26282). 
Akysidae Akysis microps Ng & Tan, 1999 Fr endemic   2.88 cm SL male/unsexed  Museum: Johor, Sungai Kahang and tributary, ZRC 42596 (Holotype, 2.78 cm SL, female) (Ref. 36133).  No picture yet.
Cyprinidae Albulichthys albuloides (Bleeker, 1855) Fr, Br native   30.00 cm SL male/unsexed   
Ambassidae Ambassis gymnocephalus (Lacepède, 1802) Fr, Br, M native  Bald glassy (English), Seriding botak (Malay), Bald glassy perchlet (English), Naked-head glassy perchlet (English), Pridin (Malay), Seriding putih (Malay)  16.00 cm TL male/unsexed  Known from Selangor (Ref. 121464). 
Ambassidae Ambassis interrupta Bleeker, 1853 Fr, Br native  Long-spined glass perchlet (English), Seriding duri (Malay), Glass perch (English), Glassfish (English), Petek (Malay), Pridin (Malay), Seriding putih (Malay)  12.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Ambassidae Ambassis miops Günther, 1872 Fr, Br, M native   10.30 cm TL male/unsexed   
Ambassidae Ambassis urotaenia Bleeker, 1852 Fr, Br, M native  Banded-tail glassy perchlet (English), Seriding jalur (Malay), Glassfish (English), Pridin (Malay), Seriding (Malay)  14.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Amblycipitidae Amblyceps foratum Ng & Kottelat, 2000 Fr native   8.51 cm SL male/unsexed  Known from the northern Peninsular Malaysia. Type locality, Sungai Brang just outside Sekayu Waterfall Park, Terengganu (Ref. 37785). 
Danionidae Amblypharyngodon atkinsonii (Blyth, 1860) Fr native  Burmese carplet (English), Bombin Burma (Malay), Bombin (Malay)  15.00 cm TL male/unsexed  Recorded from Sarawak. 
Cyprinidae Amblyrhynchichthys truncatus (Bleeker, 1850) Fr native  Mata besar (Malay)  40.00 cm SL male/unsexed   
Anabantidae Anabas testudineus (Bloch, 1792) Fr, Br native  Climbing perch (English), Pepuyu (Malay), Puyu (Malay)  25.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Cyprinidae Anematichthys repasson (Bleeker, 1853) Fr native  common (usually seen) 28.00 cm SL male/unsexed  Recorded from the Danum Valley, lower Segama and Kuamut headwaters. Small individuals are widespread in small streams but never abundant, large individuals were confined to the main Segama river (Ref. 34011). Recorded from Perak (Ref. 2091) and Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 27732, 36654. 
Anguillidae Anguilla bengalensis (Gray, 1831) Fr native  Indian mottled eel (English), Belut Benggala (Malay), Badung (Malay), Batung (Malay), Belut (Malay), Butul (Malay), Roluo (Malay), Sinsilud (Malay), Tuna (Malay)  200 cm TL male/unsexed   
Anguillidae Anguilla bicolor McClelland, 1844 Fr, Br, M native  Indonesian shortfin eel (English), Belut dwiwarna (Malay), River eel (English), Badung (Malay), Batung (Malay), Belut (Malay), Butul (Malay), Roluo (Malay), Sinsilud (Malay), Tuna (Malay)  123 cm TL male/unsexed  Known from the western and northern parts of Peninsular Malaysia; collected from the Kurau River in Bukit Merah and the Penang River on Penang Island, in the north-west (4°59'-5°23'N; 100°12'-100°40'E) (Ref. 89935). Also Ref. 4789. 
Anguillidae Anguilla malgumora Kaup, 1856 Fr, Br native  Indonesian longfinned eel (English), Belut sirip panjang (Malay), Belud (Malay), Sinsilud (Malay)  80.00 cm TL male/unsexed  Recorded from Danum valley, lower Segama and Kuamut headwaters (Ref. 34011). 
Aplocheilidae Aplocheilus panchax (Hamilton, 1822) Fr, Br native  White spot (English), Kepala timah (Malay), Mata lalat (Malay)  9.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Ariidae Arius microcephalus Bleeker, 1855 Fr, Br, M native   60.00 cm TL male/unsexed  Found in Sarawak, Borneo (Ref. 7186). Also Ref. 38478. 
Tetraodontidae Auriglobus modestus (Bleeker, 1850) Fr native   10.60 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Tetraodontidae Auriglobus nefastus (Roberts, 1982) Fr native   13.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 43281. 
Tetraodontidae Auriglobus remotus (Roberts, 1982) Fr native   6.20 cm SL male/unsexed  Recorded from the Kuamut river. Presence of this fish represents a range extension (Ref. 34011).  No picture yet.
Sisoridae Bagarius bagarius (Hamilton, 1822) Fr misidentification   230 cm TL male/unsexed  Probably referring to Bagarius lica. 
Sisoridae Bagarius lica Volz, 1903 Fr native   200 cm SL male/unsexed   
Bagridae Bagrichthys hypselopterus (Bleeker, 1852) Fr, Fi native   40.00 cm TL male/unsexed   
Bagridae Bagrichthys macracanthus (Bleeker, 1854) Fr native   25.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Bagridae Bagrichthys macropterus (Bleeker, 1854) Fr, Fi native   30.00 cm TL male/unsexed   
Bagridae Bagroides melapterus Bleeker, 1851 Fr native   34.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Cyprinidae Balantiocheilos melanopterus (Bleeker, 1850) Fr, Aq native  Bala shark (English), Hangus (Malay)  35.00 cm SL male/unsexed  Known from Perak and P.M., Sabah, Sarawak (Ref. 2091). 
Balitoridae Balitoropsis ophiolepis (Bleeker, 1853) Fr native   11.10 cm SL male/unsexed   
Balitoridae Balitoropsis zollingeri (Bleeker, 1853) Fr native   10.00 cm TL male/unsexed  Known from Pehak, Pahang and Johore (Ref. 2091) and Malay Peninsula (Ref. 26580). Also Ref. 12041. 
Cyprinidae Barbichthys laevis (Valenciennes, 1842) Fr native  Sucker barb (English), Batu hulu (Malay), Batu ulu (Malay), Bentulu (Malay)  31.00 cm TL male/unsexed   
Cyprinidae Barbodes banksi (Herre, 1940) Fr native   12.00 cm TL male/unsexed  Known from the Endau drainage (Sungai Kahang, Sungai Lenggor, Sungai Semberong), Peninsular Malaysia (Ref. 36133). Also found in Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Cyprinidae Barbodes belinka (Bleeker, 1860) Fr native   23.50 cm TL male/unsexed    No picture yet.
Cyprinidae Barbodes binotatus (Valenciennes, 1842) Fr native  Common barb (English), Putih (Malay), Tebal sisek (Malay)  20.00 cm SL male/unsexed   
Cyprinidae Barbodes dunckeri (Ahl, 1929) Fr endemic    Recorded from Peninsular Malaysia: Johor (Puntian and Sedili; acidic swamps) (Ref. 84801). Also Ref. 4537.  No picture yet.
Cyprinidae Barbodes everetti (Boulenger, 1894) Fr, Or native   15.00 cm TL male/unsexed  Recorded from streams and rivers (Ref. 57467). Recorded from Sarwak (Ref. 26580). 
Cyprinidae Barbodes kuchingensis (Herre, 1940) Fr native    Found in Sarawak, Borneo. 
Cyprinidae Barbodes rhombeus (Kottelat, 2000) Fr native   6.50 cm SL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Cyprinidae Barbodes strigatus (Boulenger, 1894) Fr native   16.80 cm TL male/unsexed  East Malaysia. Sabah rivers and streams (Ref. 84801).  No picture yet.
Cyprinidae Barbodes sunieri (Weber & de Beaufort, 1916) Fr native   28.70 cm TL male/unsexed    No picture yet.
Cyprinidae Barbonymus balleroides (Valenciennes, 1842) Fr native  abundant (always seen in some numbers) 30.00 cm TL male/unsexed  Recorded from the Danum Valley, lower Segama and Kuamut headwaters. Very abundant in cast net catches in the main channel of Sg. Segama at Danum Valley Field Centre attaining large size, but is less widespread and abundant in tributaries (Ref. 34011). Occurs in Sarwak (Ref. 26580). 
Cyprinidae Barbonymus collingwoodii (Günther, 1868) Fr native   21.50 cm TL male/unsexed  Recorded from Sarawak (Ref. 26580). 
Cyprinidae Barbonymus gonionotus (Bleeker, 1849) Fr, Fi, Aq introduced  Javanese barb (English), Javanese carp (English), Lalawak (Malay), Lampam jawa (Malay), Lawak (Malay)  43.00 cm TL male/unsexed  Present in Sungai Trengganu, Sungai Perak (Ref. 4835). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 1739, 27732, 84801. 
Cyprinidae Barbonymus schwanefeldii (Bleeker, 1854) Fr, Fi native  River barb (English), Kepia (Malay), Kepiat (Malay), Lampam Sungai (Malay)  35.00 cm SL male/unsexed  Widely distributed in all rivers and lakes of Selangor, Perak, Kelantan, Trengganu, and Pahang (Ref. 4835). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 1739, 27732, 36654. 
Barbuccidae Barbucca diabolica Roberts, 1989 Fr native   2.30 cm SL male/unsexed  Known from Johor (Ref. 2091) and Malay Peninsula (Ref. 26580). 
Bagridae Batasio fluviatilis (Day, 1888) Fr native   12.80 cm TL male/unsexed   
Siluridae Belodontichthys dinema (Bleeker, 1851) Fr native   100.00 cm TL male/unsexed   
Osphronemidae Belontia hasselti (Cuvier, 1831) Fr native   20.00 cm SL male/unsexed   
Osphronemidae Betta akarensis Regan, 1910 Fr native   14.00 cm TL male/unsexed  Known from Sarawak in Miri, Marudi, Sungai Akar, Sungai Tebu, Parit Nyadok, Sungai Nibong, Sungai Teku and Mukah (Ref. 56613). Also recorded from Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050, 56613. 
Osphronemidae Betta balunga Herre, 1940 Fr native   4.93 cm SL male/unsexed  Known from Sabah (Ref. 56613).  No picture yet.
Osphronemidae Betta bellica Sauvage, 1884 Fr native   10.00 cm TL male/unsexed  Known from Terengganu, Perak, Selangor, Pahang and Johor (Ref. 56613). Collected from blackwater peat swamp in North Selangor (Ref. 42706). 
Osphronemidae Betta brownorum Witte & Schmidt, 1992 Fr native   2.59 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 56613. 
Osphronemidae Betta chini Ng, 1993 Fr endemic   5.10 cm SL male/unsexed ;5.60 cm SL female  Known from east Sabah, Borneo (Ref. 12293). Also Ref. 12255, 132,75, 56613.  No picture yet.
Osphronemidae Betta coccina Vierke, 1979 Fr native   5.60 cm TL male/unsexed  Known from Johor (Ref. 56613). 
Osphronemidae Betta gladiator Tan & Ng, 2005 Fr endemic   5.55 cm SL male/unsexed  Presently found only in the Maliau basin, a near circular plateau enclosed by high elevations in Sabah inland, part of the Kinabantangan basin (Ref. 56613).  No picture yet.
Osphronemidae Betta hipposideros Ng & Kottelat, 1994 Fr native   7.79 cm SL male/unsexed  Known only from Selangor and Perak (Ref. 13093). Also Ref. 56613.  No picture yet.
Osphronemidae Betta ibanorum Tan & Ng, 2004 Fr endemic   8.08 cm SL male/unsexed  Found in Bako National park, in the adjacent areas around Kuching and appears to be restricted to southern Sarawak (Ref. 55025). This species is confined east towards Bau Limestone Area (Ref. 55025). Status (Ref. 84801). Also Ref. 56613. 
Osphronemidae Betta imbellis Ladiges, 1975 Fr native   6.00 cm SL male/unsexed  Known from Selangor, Pulau Penang, Perak, Kedah, Terengganu and Johor (Ref. 56613). Its occurrence in Sabah is most probably due to introduction (Ref. 56613). 
Osphronemidae Betta kuehnei Schindler & Schmidt, 2008 Fr native   8.00 cm TL male/unsexed  Type locality, Kelantan, Kota Bharu, about 35 km south of Panjang, ZMB 33884 (holotype of Betta kuehnei, 3.7 cm SL, male). Presently known only from rivulets in the northeast of Malaysian state Kelantan, south of Kota Bharu (Ref. 82661).  No picture yet.
Osphronemidae Betta lehi Tan & Ng, 2005 Fr native   6.08 cm SL male/unsexed  Found in the area southwest of Kuching, between the towns of Bau and Lundu in south Sarawak (Ref. 56613).  No picture yet.
Osphronemidae Betta livida Ng & Kottelat, 1992 Fr endemic   3.63 cm SL male/unsexed  Collected from blackwater peat swamp forest in Selangor. Status (Ref. 84801). Also Ref. 42706, 56613. 
Osphronemidae Betta macrostoma Regan, 1910 Fr native   6.70 cm SL male/unsexed  Occurs around Marudi, North Sarawak (Ref. 56613). 
Osphronemidae Betta ocellata de Beaufort, 1933 Fr native   7.98 cm SL male/unsexed  Known from Sabah in Bettotan, Sandakan, Kinabatangan, Lahad Datu, Tawau and Bongon (Ref. 56613). Observed from Lahad Datu (Danum Valley) in stagnant or slow moving clearwater pool along headwater streams (Ref. 56613). Collected also within the Kinabatangan basin from lowland forest streams and ox-box lakes. Found in the shallow parts of ox-box lakes among the flooded grass banks and among the submerged leaf litter and tree roots in the forest streams (Ref. 56613). In Tawau, numerous individuals inhabit quiet murky pools along the coast in oil palm plantations (Ref. 56613). 
Osphronemidae Betta omega Tan & Ahmad, 2018 Fr, Br native   8.12 cm SL male/unsexed  Type locality of Betta omega, Sungai Burong near Jeram Batu, Pekan Nanas, Johor (Ref. 127779).  No picture yet.
Osphronemidae Betta persephone Schaller, 1986 Fr endemic   2.59 cm SL male/unsexed  Known from Johor (Ref. 56613). Status (Ref. 84801). Also Ref. 12802. 
Osphronemidae Betta pi Tan, 1998 Fr native   9.00 cm SL male/unsexed  Expected to occur in the peat swamp forests of Kelantan (Ref. 56613). 
Osphronemidae Betta picta (Valenciennes, 1846) Fr questionable   6.00 cm TL male/unsexed   
Osphronemidae Betta pugnax (Cantor, 1849) Fr native   6.73 cm SL male/unsexed  Occurs in Penang, Kedah, Terengganu, Pahang, Selangor and Johor (Ref. 56613). Samples from Penang were mainly collected from hill streams and foothills with clear water ranging from fast to slow-flowing and with substrate usually consisting of sand with rocks (Ref. 56613). Also Ref. 13220, 36654. 
Osphronemidae Betta pulchra Tan & Tan, 1996 Fr endemic   5.59 cm SL male/unsexed  Appears to be restricted to the blackwaters in Pontian, Johor (Ref. 13220). Status (Ref. 84801). Also Ref. 56613. 
Osphronemidae Betta splendens Regan, 1910 Fr, Aq introduced  Belaga (Malay), Sepilai (Malay) occasional (usually not seen) 6.50 cm TL male/unsexed  Popular aquarium fish. 
Osphronemidae Betta stigmosa Tan & Ng, 2005 Fr endemic   4.11 cm SL male/unsexed  Presently known only from the hill streams in Sekayu area, Terengganu, Peninsular Malaysia (Ref. 56613).  No picture yet.
Osphronemidae Betta taeniata Regan, 1910 Fr native   5.49 cm SL male/unsexed  Known from hills streams of southern Sarawak (Ref. 56613). 
Osphronemidae Betta tomi Ng & Kottelat, 1994 Fr native   7.04 cm SL male/unsexed  Found in eastern Johor. 
Osphronemidae Betta tussyae Schaller, 1985 Fr endemic   3.65 cm SL male/unsexed  Known from Pahang (Ref. 56613). Status (Ref. 84801). Also Ref. 12802. 
Osphronemidae Betta waseri Krummenacher, 1986 Fr endemic   9.80 cm SL male/unsexed  Known from Pahang, Terengganu and Kuantan (Ref. 56613). Also Ref. 7050, 13093.  No picture yet.
Chaudhuriidae Bihunichthys monopteroides Kottelat & Lim, 1994 Fr native   3.60 cm SL male/unsexed  Recorded from Selangor.  No picture yet.
Sciaenidae Boesemania microlepis (Bleeker, 1858) Fr native  Boeseman croaker (English), Gelama bota (Malay), Croaker (English), Gelama (Malay), Panjang (Malay), Tengkerong (Malay)  100.00 cm SL male/unsexed  Found in river tributaries of peninsular Malaysia (Ref. 43946). 
Oxudercidae Boleophthalmus boddarti (Pallas, 1770) Fr, Br, M native  Boddart's goggle-eyed goby (English), Belodok tembakul (Malay), Goby (English), Layar (Malay), Tembakul (Malay), Ubi (Malay)  22.00 cm TL male/unsexed   
Danionidae Boraras maculatus (Duncker, 1904) Fr native   2.50 cm SL male/unsexed  Rare or extinct (Ref. 4835).  
Danionidae Boraras urophthalmoides (Kottelat, 1991) Fr native   4.00 cm TL male/unsexed   
Soleidae Brachirus panoides (Bleeker, 1851) Fr, Br native  Sole (English), Lidah-bronok Asia (Malay), Lidah (Malay)  20.00 cm TL male/unsexed   
Gobiidae Brachygobius aggregatus Herre, 1940 Fr native   4.40 cm SL male/unsexed  Known in N. Borneo.  
Gobiidae Brachygobius doriae (Günther, 1868) Fr native   4.20 cm TL male/unsexed  Recorded from Sarawak and Selangor (Ref. 43716). 
Gobiidae Brachygobius kabiliensis Inger, 1958 Fr, Br native   1.80 cm SL male/unsexed  Museum: Kabili River, East Coast Residency, Sandakan, Sabah FMNH 47991 (holotype, 1.4 cm SL) (Ref. 43716). 
Gobiidae Brachygobius nunus (Hamilton, 1822) Fr native   2.50 cm SL male/unsexed   
Gobiidae Brachygobius xanthomelas Herre, 1937 Fr native   2.00 cm SL male/unsexed  Type locality: Mawai district, Johore, Malay Peninsula (Ref. 43716). 
Danionidae Brevibora cheeya Liao & Tan, 2011 Fr native   2.80 cm SL male/unsexed  Type locality, Terengganu, Rantau Abang, 56 km to Kuala Terengganu, ZRC 51965 (holotype of Brevibora cheeya, 2.66 cm SL). Known from both in the westerly and easterly flowing river basins of Peninsular Malaysia (western: Selangor; eastern: Terengganu, Pahang, Johor), Central Sumatra (Jambi, Riau) and Banka Island (Ref. 86526).  No picture yet.
Danionidae Brevibora dorsiocellata (Duncker, 1904) Fr native   2.30 cm SL male/unsexed  Museum: Pahang, Tasek Bera, CAS-SU 47281. Also found in Muar, Negri Sembilan, and Johore.  
Butidae Butis gymnopomus (Bleeker, 1853) Fr, Br, M native  Goby (English), Ubi (Malay), Puntang (Malay)  11.50 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184).  No picture yet.
Cyprinidae Carassius auratus (Linnaeus, 1758) Fr, Or introduced  Edible goldfish (English), Ikan mas (Malay)  48.00 cm TL male/unsexed  One of the species being advertised by the Aquarium Fish Industry in Malaysia (Ref. 47892). 
Carcharhinidae Carcharhinus leucas (Valenciennes, 1839) Fr, Br, M, Fi native  Bull shark (English), Jerung sapi (Malay), Freshwater whaler (English), River whaler (English), Swan River whaler (English), Jerung (Malay), Yu (Malay), Yu bekeng (Malay), Yu ganas (Malay), Yu garang (Malay)  360 cm TL male/unsexed ;400 cm TL female  Known from Borneo (Ref. 9997). 
Tetraodontidae Carinotetraodon borneensis (Regan, 1903) Fr native   4.40 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Tetraodontidae Carinotetraodon lorteti (Tirant, 1885) Fr native   6.00 cm SL male/unsexed  Found in Peninsular Malaysia and Sarawak, northwestern Borneo (Ref. 1321). Also Ref. 36654. 
Tetraodontidae Carinotetraodon salivator Lim & Kottelat, 1995 Fr native   4.00 cm SL male/unsexed  Known only from the vicinity of Kuching and the middle and lower Rajang basin in Sarawak, northwestern Borneo. In Sungai Isu, it has been recorded in relatively fast flowing, clear water in riffles in the forest. In Sungai Nibong, it was collected from a small blackwater stream draining a peat swamp area, with relatively fast flowing, deep (1.5-2 m) water (Ref. 13214). Also Ref. 13275, 57780. 
Ariidae Cephalocassis melanochir (Bleeker, 1852) Fr, Br native   30.00 cm TL male/unsexed  Known from Sarawak (Ref. 6868). Also Ref. 58022. 
Cyprinidae Ceratogarra cambodgiensis (Tirant, 1883) Fr native   24.00 cm TL male/unsexed  Occurs in the Malay Peninsula (Ref. 36654). 
Siluridae Ceratoglanis scleronema (Bleeker, 1863) Fr native   44.00 cm SL male/unsexed  Known from Pahang drainage in Peninsular Malaysia (Ref. 38651) and Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Chacidae Chaca bankanensis Bleeker, 1852 Fr native   20.00 cm TL male/unsexed   
Chaetodontidae Chaetodon adiergastos Seale, 1910 Fr native  Philippine butterflyfish (English), Bagang tompok mata (Malay), Eye-patch butterflyfish (English), Bagang (Malay)  20.00 cm TL male/unsexed  Occurs in Borneo. 
Channidae Channa bankanensis (Bleeker, 1853) Fr native   23.50 cm TL male/unsexed  Specimens were collected in a peat-swamp forest of N Selangor (Ref. 38465). Also Ref. 7050. 
Channidae Channa baramensis (Steindachner, 1901) Fr native    Type locality, Baram River, Borneo (Ref. 50838).  No picture yet.
Channidae Channa gachua (Hamilton, 1822) Fr native   32.90 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 27732. 
Channidae Channa lucius (Cuvier, 1831) Fr native   53.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Channidae Channa marulioides (Bleeker, 1851) Fr native   27.00 cm TL male/unsexed   
Channidae Channa melasoma (Bleeker, 1851) Fr native   30.00 cm SL male/unsexed   
Channidae Channa micropeltes (Cuvier, 1831) Fr, Aq native  Toman (Malay)  130 cm SL male/unsexed   
Channidae Channa orientalis Bloch & Schneider, 1801 Fr native   33.00 cm TL male/unsexed   
Channidae Channa punctata (Bloch, 1793) Fr questionable   31.00 cm TL male/unsexed   
Channidae Channa striata (Bloch, 1793) Fr, Fi, Aq native  Aruan (Malay), Haruan (Malay), Ruan (Malay), Toman (Malay), Toman paya (Malay)  100.00 cm SL male/unsexed 36.25 TL Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Chaudhuriidae Chaudhuria caudata Annandale, 1918 Fr native   6.00 cm TL male/unsexed   
Chaudhuriidae Chendol keelini Kottelat & Lim, 1994 Fr native   5.64 cm SL male/unsexed  Recorded from Selangor.  No picture yet.
Hemiscylliidae Chiloscyllium indicum (Gmelin, 1789) Fr, Br, M, Fi questionable  Slender bambooshark (English), Yu-cicak tembaga (Malay), Catshark (English), Dogshark (English), Ridge-back bambooshark (English), Slender bamooshark (English), Kau suar (Malay), Yu belak (Malay), Yu bodoh (Malay), Yu cicak (Malay), Yu pasir (Malay), Yu pokah (Malay), Yu rimau (Malay), Yu tekek (Malay), Yu tembaga (Malay), Yu tokeh (Malay)  65.00 cm TL male/unsexed  Possibly may occur in fresh water in the lower reaches of the Perak River in peninsular Malayasia (Ref. 43278). Also Ref. 247, 43278, 53392. Needs further confirmation. 
Notopteridae Chitala borneensis (Bleeker, 1851) Fr, Fi native   39.30 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 56749.  No picture yet.
Notopteridae Chitala chitala (Hamilton, 1822) Fr misidentification  Belida (Malay)  122 cm SL male/unsexed  Outside the distributional range of the species and occurrence may be based on C. lopis (Ref. 7431). 
Notopteridae Chitala lopis (Bleeker, 1851) Fr extirpated   150 cm SL male/unsexed   
Cichlidae Cichla monoculus Agassiz, 1831 Fr introduced   70.00 cm SL male/unsexed  Have been introduced into ponds but extent of their spread and full effect are unknown. There had been no serious attempt to list the introduced species nor to identify threats they posed (Ref. 84801). 
Cichlidae Cichla ocellaris Bloch & Schneider, 1801 Fr introduced   74.00 cm TL male/unsexed  Have been introduced into ponds but extent of their spread and full effect are unknown. There had been no serious attempt to list the introduced species nor to identify threats they posed (Ref. 84801). 
Cyprinidae Cirrhinus cirrhosus (Bloch, 1795) Fr introduced  Mrigal (Malay)  100.00 cm SL male/unsexed  Released in Lake Chanderoh and is now available in the Perak river near the Chanderoh dam (Ref. 4835). 
Cyprinidae Cirrhinus molitorella (Valenciennes, 1844) Fr, Fi introduced  Mud carp (English), Kap lumpur (Malay)  55.00 cm TL male/unsexed  Sometimes found to be sold in local markets. This record refers to Cirrhinus chinensis. 
Clariidae Clarias anfractus Ng, 1999 Fr native   17.64 cm SL male/unsexed  Museum: forest stream 600 m into conservation area, tributary of Sungai Segama, Danum, Sabah, Borneo, ZRC 42598 (holotype of C. anfractus, 17.64 cm SL). Sungai Tawan, Sungai Tibas camp, Kalabakan, Tawau District, Sabah, FMNH 68095 (paratypes, 16.63-17.21 cm SL) (Ref. 39637).  No picture yet.
Clariidae Clarias batrachus (Linnaeus, 1758) Fr, Aq misidentification  Freshwater catfish (English), Ikan lele (Malay), Keli (Malay)  47.00 cm TL male/unsexed  Occurs in the Malay Peninsula. Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Clariidae Clarias batu Lim & Ng, 1999 Fr endemic   30.50 cm SL male/unsexed  Type locality: Sungai Baharu, on right side of Tekek-Juara trail, towards Juara, Pulau Tioman, Pahang, ZRC 40087 (holotype of C. batu, 24.5 cm SL) (Ref. 39637). Also Ref. 84801. 
Clariidae Clarias gariepinus (Burchell, 1822) Fr introduced   170 cm TL male/unsexed  Introduced in the late 1980s. Greater interest shown in culturing this species and its hybrid with C. macrocephalus than in producing the local species. There had been no serious attempt to list the introduced species nor to identify threats they posed (Ref. 84801). 
Clariidae Clarias leiacanthus Bleeker, 1851 Fr native   33.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Clariidae Clarias macrocephalus Günther, 1864 Fr introduced  Freshwater catfish (English), Keli (Malay), Keli bunga (Malay)  120 cm TL male/unsexed 17 TL Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Clariidae Clarias planiceps Ng, 1999 Fr native   29.73 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Clariidae Clarias sulcatus Ng, 2004 Fr native   20.70 cm SL male/unsexed  Known from Pulau Redang (Redang Island) off the northeastern coast of the Malay Peninsula (Ref. 55369).  No picture yet.
Clariidae Clarias teijsmanni Bleeker, 1857 Fr native   22.00 cm TL male/unsexed  Recorded from the Danum Valley and represents a new record for the Segama basin (Ref. 34011). Recorded from Pulau Tioman (Ref. 41184) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Ehiravidae Clupeichthys perakensis (Herre, 1936) Fr native   4.00 cm SL male/unsexed   
Ailiidae Clupisoma sinense (Huang, 1981) Fr native   31.00 cm SL male/unsexed  Known from the Pahang River. 
Engraulidae Coilia lindmani Bleeker, 1857 Fr, Br native  Lindman's grenadier anchovy (English), Bulu ayam sungai (Malay), Grenadier anchovy (English), Bilis bulu ayam (Malay)  20.00 cm SL male/unsexed   
Cichlidae Coptodon zillii (Gervais, 1848) Fr, Br not established    40.00 cm SL male/unsexed  Also Ref. 52307. 
Ehiravidae Corica laciniata Fowler, 1935 Fr native   7.00 cm SL male/unsexed   
Ehiravidae Corica soborna Hamilton, 1822 Fr native   5.30 cm TL male/unsexed   
Cyprinidae Cosmochilus falcifer Regan, 1906 Fr native   48.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Cyprinidae Crossocheilus atrilimes Kottelat, 2000 Fr native   16.40 cm TL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Cyprinidae Crossocheilus cobitis (Bleeker, 1854) Fr native  common (usually seen) 14.80 cm TL male/unsexed  Recorded from the Danum Valley, lower Segama and Kuamut headwaters. Common species in fast flowing areas of both main Segama river and tributaries. Dentrivorous, found sympatrically with Garra borneensis in schools of up to 50 individuals (Ref. 34011). 
Cyprinidae Crossocheilus elegans Kottelat & Tan, 2011 Fr native   10.63 cm SL male/unsexed  Known from Segama and Kinabatangan drainages in Sabah (Ref. 87793).  No picture yet.
Cyprinidae Crossocheilus langei Bleeker, 1860 Fr native   14.50 cm TL male/unsexed   
Cyprinidae Crossocheilus nigriloba Popta, 1904 Fr native   13.90 cm TL male/unsexed   
Cyprinidae Crossocheilus oblongus Kuhl & Van Hasselt, 1823 Fr native   16.00 cm SL male/unsexed  Also Ref. 4537. 
Cyprinidae Crossocheilus pseudobagroides Duncker, 1904 Fr native   5.20 cm SL male/unsexed  Known from Sungai Selangi and Sungai Kahang in Johor (Ref. 81211).  No picture yet.
Xenocyprididae Ctenopharyngodon idella (Valenciennes, 1844) Fr, Fi, Aq not established  Grass carp (English), Kap makan rumput (Malay), Kap rumput (Malay), Tongsan (Malay)  150 cm TL male/unsexed 55.5 TL Established in aquaculture through assisted/artificial reproduction. Has not established in the wild (Ref. 1739).Total production from ponds reached 1,108 mt in 1991. 
Cyprinidae Cyclocheilichthys apogon (Valenciennes, 1842) Fr native   28.70 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 2091, 36654. 
Cyprinidae Cyclocheilichthys armatus (Valenciennes, 1842) Fr native   23.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 2091. 
Cyprinidae Cyclocheilichthys enoplos (Bleeker, 1849) Fr native   74.00 cm SL male/unsexed   
Cynoglossidae Cynoglossus feldmanni (Bleeker, 1854) Fr native   25.00 cm SL male/unsexed  Occurs in Borneo (Ref. 5297). 
Cynoglossidae Cynoglossus kapuasensis Fowler, 1905 Fr native   28.50 cm SL male/unsexed  Occurs in Kapuas River, Western Borneo (Ref. 5297). 
Cynoglossidae Cynoglossus microlepis (Bleeker, 1851) Fr native   32.50 cm SL male/unsexed  Known from Sarawak, Borneo (Ref. 5297). 
Cynoglossidae Cynoglossus waandersii (Bleeker, 1854) Fr native   8.30 cm SL male/unsexed  Occurs in Borneo (Ref. 5297). 
Cyprinidae Cyprinus carpio Linnaeus, 1758 Fr, Fi, Aq introduced  Common carp (English), Leekoh (Malay)  120 cm TL male/unsexed  Total production reached 1,283 mt in 1991.  
Danionidae Danio albolineatus (Blyth, 1860) Fr native   9.58 cm TL male/unsexed   
Danionidae Danio kerri Smith, 1931 Fr native   5.00 cm TL male/unsexed   
Lobotidae Datnioides polota (Hamilton, 1822) Fr native   30.00 cm SL male/unsexed  Known from Telok Anson, western Malaysia and Sarawak, Borneo (Ref. 10425). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Zenarchopteridae Dermogenys bispina Meisner & Collette, 1998 Fr native   5.01 cm SL male/unsexed  Type locality of Dermogenys bispina, Kuamut drainage of the Kinabatangan basin, Danum Valley, Sabah, Borneo (Ref. 44897).  No picture yet.
Zenarchopteridae Dermogenys collettei Meisner, 2001 Fr native   5.09 cm SL male/unsexed  Type locality of Dermogenys collettei, Kuching, Sarawak. Known from Peninsualr Malaysia and Borneo (Ref. 44897).  No picture yet.
Zenarchopteridae Dermogenys pusilla Kuhl & van Hasselt, 1823 Fr, Br questionable  Wrestling halfbeak (English), Jolong sungai (Malay), Halfbeak (English), Jolong-jolong (Malay), Menyulong (Malay)  16.10 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). Also Ref.4835. Outside distributional range, occurrence needs further confirmation. 
Cyprinidae Desmopuntius hexazona (Weber & de Beaufort, 1912) Fr native   5.50 cm TL male/unsexed  Also Ref. 13275, 26580. 
Cyprinidae Desmopuntius johorensis (Duncker, 1904) Fr native   12.00 cm TL male/unsexed  Known from Johor (Muar River at Tubing Tinggi [= Tebing Tinggi], Pahang, Terengganu and Selangor, Perak (Ref. 37849). Also found in Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 4537. 
Cyprinidae Desmopuntius pentazona (Boulenger, 1894) Fr native   8.80 cm TL male/unsexed  Known from Borneo, Sarawak (Ref. 37831). Also Ref. 4537, 36654, 26580. 
Leiognathidae Deveximentum ruconius (Hamilton, 1822) Fr, Br, M native  Deep pugnose ponyfish (English), Sekiki bulat (Malay), Deep-bodied ponyfish (English), Ponyfish (English), Slender pony (English), Slipmouth (English), Tooth-pony (English), Kekek (Malay), Kikek (Malay), Pulot-pulot (Bajau) (Malay)  8.00 cm TL male/unsexed   
Tetraodontidae Dichotomyctere fluviatilis (Hamilton, 1822) Fr, Br native  Green pufferfish (English), Buntal-gigi hijau (Malay), Buntal (Malay)  17.00 cm TL male/unsexed  Known from Selangor as Chelonodon fluviatilis (Ref. 121464). 
Tetraodontidae Dichotomyctere kretamensis (Inger, 1953) Fr native   4.50 cm SL male/unsexed  Recorded from Sabah, East Malaysia (Ref. 84801).  No picture yet.
Tetraodontidae Dichotomyctere nigroviridis (Marion de Procé, 1822) Fr native  Spotted green pufferfish (English), Buntal-gigi kupang (Malay)  17.00 cm TL male/unsexed   
Tetraodontidae Dichotomyctere ocellatus (Steindachner, 1870) Fr native   8.00 cm TL male/unsexed   
Cyprinidae Discherodontus halei (Duncker, 1904) Fr native   10.50 cm TL male/unsexed   
Syngnathidae Doryichthys boaja (Bleeker, 1850) Fr native  Undok-undok (Malay)  41.00 cm SL male/unsexed  Also Ref. 36654. 
Syngnathidae Doryichthys deokhatoides (Bleeker, 1854) Fr native   18.50 cm SL male/unsexed   
Syngnathidae Doryichthys martensii (Peters, 1868) Fr native   15.00 cm SL male/unsexed  Known from the Rajang basin in Sarawak, Borneo (Ref. 57780). Also Ref. 5316. 
Gobiidae Dotsugobius bleekeri (Popta, 1921) Fr, Br native   3.43 cm SL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Cyprinidae Eirmotus octozona Schultz, 1959 Fr native   3.56 cm SL male/unsexed  Used to be found in peat swamp forests of the area of Ayer Hitam, Johor but has not been collected anymore despite numerous sampling efforts (Ref. 78741). 
Eleotridae Eleotris melanosoma Bleeker, 1853 Fr native   26.00 cm SL male/unsexed  Recorded from Pulau Tioman (Ref. 41184) and Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Mugilidae Ellochelon vaigiensis (Quoy & Gaimard, 1825) Fr, Br, M native  Squaretail mullet (English), Belanak loban (Malay), Diamond-scaled grey mullet (English), Diamond-scaled mullet (English), Long-scaled mullet (English), Mullet (English), Andopong (Bajau) (Malay), Belanak (Malay), Belanak tamok (Malay), Belanak tamuk (Malay), Kedera (Malay), Loban (Malay), Or hu (Malay), Pelong (Malay), Pelung (Malay), Punti (Malay), Puting damak (Malay), Puting damar (Malay), Tamok (Malay), Tamuk (Malay)  63.00 cm TL male/unsexed   
Ellopostomatidae Ellopostoma megalomycter (Vaillant, 1902) Fr native   4.90 cm SL male/unsexed  Occurs in Malay Peninsula (Ref. 26580). 
Clariidae Encheloclarias baculum Ng & Lim, 1993 Fr native   5.71 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Clariidae Encheloclarias curtisoma Ng & Lim, 1993 Fr endemic   8.20 cm SL male/unsexed  Recorded at present only from the blackwater streams of the north Selangor peat swamp forest, Selangor. 
Clariidae Encheloclarias kelioides Ng & Lim, 1993 Fr native   6.48 cm SL male/unsexed  Known from Pahang and Mawai, Johor.  No picture yet.
Clariidae Encheloclarias prolatus Ng & Lim, 1993 Fr endemic   8.55 cm SL male/unsexed  Known only from Kuching (Ref. 84801), western Sarawak, Borneo (Ref. 12325). Also Ref. 13275.  No picture yet.
Cyprinidae Epalzeorhynchos kalopterum (Bleeker, 1850) Fr native   16.00 cm TL male/unsexed  Also Ref. 4537. 
Danionidae Esomus caudiocellatus Ahl, 1923 Fr native     
Danionidae Esomus malayensis Ahl, 1923 Fr native   8.00 cm TL male/unsexed    No picture yet.
Danionidae Esomus metallicus Ahl, 1923 Fr native   7.50 cm SL male/unsexed  Found in Sabah, Borneo (Ref. 13275) and in the northern Malay Peninsula (Ref. 27732). Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Cichlidae Etroplus suratensis (Bloch, 1790) Fr, Br introduced   40.00 cm TL male/unsexed  Established in ponds and brackish waters in Sabah and Sarawak. Also Ref. 6095. 
Gobiidae Eugnathogobius kabilia (Herre, 1940) Fr native   3.60 cm TL male/unsexed  Museum: Kabili River, British North Borneo, Sabah, CAS 32978 (3.65 cm SL) (Ref. 43716). 
Gobiidae Eugnathogobius siamensis (Fowler, 1934) Fr native   4.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Museum: Mawai district, Johore, CAS 29080 (holotype of Vaimosa mawaia, 2.4 cm SL). Tawau, British North Borneo, Sabah, CAS 32988 (holotype of Vaimosa oratai, 1.8 cm SL) (Ref. 43716). 
Dasyatidae Fluvitrygon signifer (Compagno & Roberts, 1982) Fr, Fi native  White-edge freshwater whip ray (English), Pari sungai (Malay), Freshwater stingray (English), Pale whipray (English), White-rimmed stingray (English), Pari (Malay), Pari air tawar (Malay)  60.00 cm WD male/unsexed  Known from Sungai Perak (Ref. 38725). Recorded during 1999-2004 study (Ref. 53392). 
Poeciliidae Gambusia affinis (Baird & Girard, 1853) Fr, Br introduced   5.10 cm TL male/unsexed ;7.00 cm TL female   
Cyprinidae Garra borneensis (Vaillant, 1902) Fr native  Batduan (Malay), Tunjungan (Malay) abundant (always seen in some numbers) 11.50 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also recorded from the Danum Valley and Kuamut headwaters. Ubiquitous and abundant in fast flowing water. Found sympatrically with Crossocheilus cobitis (Ref. 34011). Also Ref. 3310. 
Cyprinidae Garra robertsi Thoni & Mayden, 2015 Fr native   10.37 cm SL male/unsexed  Known only from Sungai Bongan and Tempassuk rivers in northern Sabah (Ref. 103293).  No picture yet.
Gastromyzontidae Gastromyzon aequabilis Tan, 2006 Fr endemic   3.52 cm SL male/unsexed  Found only in the Kuamut drainage of the Kinabatangan River basin in eastern Sabah (Ref. 57871). Status (Ref. 84801).  No picture yet.
Gastromyzontidae Gastromyzon aeroides Tan & Sulaiman, 2006 Fr native   4.59 cm SL male/unsexed  Known from Petagas, Padas and Mengalong river basins in western Sabah (Ref. 56228).  No picture yet.
Gastromyzontidae Gastromyzon auronigrus Tan, 2006 Fr endemic   5.53 cm SL male/unsexed  Found only in Sungai Kinarom draining into Marudu Bay in Sabah (Ref. 57871).  No picture yet.
Gastromyzontidae Gastromyzon bario Tan, 2006 Fr endemic   9.05 cm SL male/unsexed  Found in the upper Trusan, Limbang and middle and upper Baram River basins in north Sarawak (Ref. 57871). Collected only from the hill streams in the Bario plateu, but is also found in the main Dapur river during low water season (Ref. 57871). Status (Ref. 84801).  No picture yet.
Gastromyzontidae Gastromyzon borneensis Günther, 1874 Fr native   10.00 cm SL male/unsexed  Occurs in Sarawak (Ref. 26580). 
Gastromyzontidae Gastromyzon cornusaccus Tan, 2006 Fr endemic   4.90 cm SL male/unsexed  Found only in Sungai Kinarom draining from the north of Mount Kinabalu into the Marudu Bay (Ref. 57871).  No picture yet.
Gastromyzontidae Gastromyzon crenastus Tan & Leh, 2006 Fr endemic   2.84 cm SL male/unsexed  Found in southern Sarawak (Ref. 57901).  No picture yet.
Gastromyzontidae Gastromyzon ctenocephalus Roberts, 1982 Fr native   4.50 cm SL male/unsexed  Occurs in Sarwak.  No picture yet.
Gastromyzontidae Gastromyzon danumensis Chin & Inger, 1989 Fr native  common (usually seen) 4.50 cm SL male/unsexed  Known from northern Borneo (Ref. 7050). Recorded from Danum valley and Kuamut headwaters. Fairly ubiquitous and highly abundant (Ref. 34011). Also Ref. 84801. 
Gastromyzontidae Gastromyzon extrorsus Tan, 2006 Fr endemic   7.67 cm SL male/unsexed  Found in the westward draining coastal rivers of the Crocker Range in West Sabah - the Kimanis and Petagas River basins (Ref. 57871).  No picture yet.
Gastromyzontidae Gastromyzon farragus Tan & Leh, 2006 Fr endemic   3.89 cm SL male/unsexed  Found in southern Sarawak (Ref. 57901). 
Gastromyzontidae Gastromyzon fasciatus Inger & Chin, 1961 Fr native   7.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580, 84801. 
Gastromyzontidae Gastromyzon ingeri Tan, 2006 Fr endemic   5.42 cm SL male/unsexed  Found only in short coastal rivers (Marotai, Tawau, Kinabutan, Balung and Mentri) draining into Wallace Bay in Sabah (Ref. 57871).  No picture yet.
Gastromyzontidae Gastromyzon introrsus Tan, 2006 Fr endemic   9.44 cm SL male/unsexed  Known from Padas and Labuk River basins in Sabah (Ref. 57871).  No picture yet.
Gastromyzontidae Gastromyzon katibasensis Leh & Chai, 2003 Fr endemic    Found in Katibas sub-basin of Rejang River basin in Sarawak (Ref. 57871).  No picture yet.
Gastromyzontidae Gastromyzon lepidogaster Roberts, 1982 Fr native  abundant (always seen in some numbers) 10.15 cm SL male/unsexed  Recorded from Danum valley and Kuamut headwaters. Most common and abundant Gastromyzon in the headwater streams of Danum Valley Field Centre. Currently the largest known species of the genus (Ref. 34011). 
Gastromyzontidae Gastromyzon megalepis Roberts, 1982 Fr native   6.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580.  No picture yet.
Gastromyzontidae Gastromyzon monticola (Vaillant, 1889) Fr native   7.00 cm SL male/unsexed  Known from northern Borneo (Ref. 7050).  No picture yet.
Gastromyzontidae Gastromyzon ocellatus Tan & Ng, 2004 Fr endemic   4.53 cm SL male/unsexed  Known from the Bau Limestone area and its vicinity draining into the Sarawak basin in south Sarawak (Ref. 55025). 
Gastromyzontidae Gastromyzon ornaticauda Tan & Martin-Smith, 1998 Fr native   7.00 cm SL male/unsexed  Only found in the Kuamut headstreams. 
Gastromyzontidae Gastromyzon pariclavis Tan & Martin-Smith, 1998 Fr endemic   6.00 cm SL male/unsexed  Only found in the Kuamut headstreams.  No picture yet.
Gastromyzontidae Gastromyzon punctulatus Inger & Chin, 1961 Fr native  scarce (very unlikely) 6.50 cm SL male/unsexed  Known from Baram, Tatau, Rejang and Lupar River basins in Sarawak (Ref. 57871). Also found in the Rajang Basin in Sarawak, Borneo (Ref. 57780). Recorded from Danum valley. Rarest species of Gastromyzon in the Danum Valley Field Centre (Ref. 34011). Also Ref. 3310, 26580. 
Gastromyzontidae Gastromyzon ridens Roberts, 1982 Fr native   5.00 cm SL male/unsexed  Known from Sarawak. Also Ref. 26580. 
Gastromyzontidae Gastromyzon scitulus Tan & Leh, 2006 Fr endemic    Found in Serian, Sadong basin (Ref. 84801), southern Sarawak (Ref. 57901). 
Gastromyzontidae Gastromyzon spectabilis Tan, 2006 Fr endemic   5.93 cm SL male/unsexed  Found only in the Segama River basin in eastern Sabah (Ref. 57871).  No picture yet.
Gastromyzontidae Gastromyzon stellatus Tan, 2006 Fr endemic   5.24 cm SL male/unsexed  Known from Sarawak, Sadong and Lupar River basins in southern Sarawak (Ref. 57871). 
Gastromyzontidae Gastromyzon umbrus Tan, 2006 Fr native   5.07 cm SL male/unsexed  Known from Kalabakan River basin in Sabah (Ref. 57871).  No picture yet.
Gastromyzontidae Gastromyzon viriosus Tan, 2006 Fr endemic   5.37 cm SL male/unsexed  Presently found only in the Tatau River basin in central Sarawak (Ref. 57871). 
Gerreidae Gerres filamentosus Cuvier, 1829 Fr, Br, M native  Whipfin silverbiddy (English), Kapas filamen (Malay), Long-rayed mojarra (English), Long-rayed silver biddy (English), Majorras (English), Mojarra (English), Silver-biddy (English), Whipfin mojarra (English), Bansa (Malay), Kapas laut (Malay), Kapas-kapas (Malay), Kekapas (Malay), Lamuruk (Malay), Sedakang (Malay), Senohong (Malay), Senolong (Malay), Tampok-tampok (Malay)  39.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Gastromyzontidae Glaniopsis denudata Roberts, 1982 Fr native   4.38 cm SL male/unsexed  Known from northern Borneo (Ref. 7050).  No picture yet.
Gastromyzontidae Glaniopsis gossei Roberts, 1982 Fr native   4.70 cm SL male/unsexed  Known from northern Borneo (Ref. 7050) and Sarawak (Ref. 26580).  No picture yet.
Gastromyzontidae Glaniopsis hanitschi Boulenger, 1899 Fr native   9.70 cm SL male/unsexed  Known from northern Borneo (Ref. 7050).  No picture yet.
Gastromyzontidae Glaniopsis multiradiata Roberts, 1982 Fr native   6.00 cm SL male/unsexed  Known from northern Borneo (Ref. 7050) and Sarwak (Ref. 26580).  No picture yet.
Gobiidae Glossogobius aureus Akihito & Meguro, 1975 Fr, Br native  Golden tank goby (English), Belodok mas (Malay), Goby (English), Belukor (Malay)  25.00 cm SL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Gobiidae Glossogobius celebius (Valenciennes, 1837) Fr native   14.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Gobiidae Glossogobius circumspectus (Macleay, 1883) Fr native   35.00 cm TL male/unsexed  Known from Sabah, Borneo. 
Gobiidae Glossogobius giuris (Hamilton, 1822) Fr, Br, M native  Tank goby (English), Belodok ubi (Malay), Goby (English), Bekukor (Malay), Bekulor (Malay), Bekut trisau (Malay), Belodok (Malay), Belukor (Malay), Pusong (Malay), Ubi (Malay)  50.00 cm SL male/unsexed   
Sisoridae Glyptothorax laosensis Fowler, 1934 Fr native   10.80 cm SL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Sisoridae Glyptothorax major (Boulenger, 1894) Fr native   14.40 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Sisoridae Glyptothorax platypogon (Valenciennes, 1840) Fr questionable   10.00 cm TL male/unsexed  Outside distributional range (Ref. 128699). Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Sisoridae Glyptothorax platypogonides (Bleeker, 1855) Fr native   12.30 cm TL male/unsexed   
Sisoridae Glyptothorax siamensis Hora, 1923 Fr native   13.90 cm TL male/unsexed  Known from Selangor (Ref. 56938). 
Gobiidae Gobiopterus chuno (Hamilton, 1822) Fr native   3.00 cm SL male/unsexed   
Ambassidae Gymnochanda filamentosa Fraser-Brunner, 1955 Fr native   3.80 cm SL male/unsexed  Known from the southernmost part of Malay Peninsula (Johore). 
Cyprinidae Hampala ampalong (Bleeker, 1852) Fr native   15.50 cm TL male/unsexed   
Cyprinidae Hampala bimaculata (Popta, 1905) Fr native   50.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). In range Ref. 7050.  No picture yet.
Cyprinidae Hampala macrolepidota Kuhl & Van Hasselt, 1823 Fr, Fi, Sp native  Carp (English), Sebarau (Malay)  70.00 cm SL male/unsexed 15 TL Occurs in the Malay Peninsula (Ref. 27732). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 4832, 36654. 
Cyprinidae Hampala sabana Inger & Chin, 1962 Fr endemic  common (usually seen) 41.00 cm SL male/unsexed  Type locality: tributary of Kinabatangan river near Deramakot (Ref. 33021). Also recorded from the Danum Valley, lower Segama and Kuamut headwaters. Common in slower, deeper areas of streams but never abundant. Larger individuals are actively predatory and have been observed disgorging frogs and small fish when caught (Ref. 34011).  No picture yet.
Helostomatidae Helostoma temminckii Cuvier, 1829 Fr native  Kissing gourami (English), Tebakang (Malay), Temakang (Malay)  30.00 cm TL male/unsexed  Also Ref. 6028, 1739, 9987. 
Ariidae Hemiarius harmandi Sauvage, 1880 Fr, Br native   12.00 cm TL male/unsexed  Known from Baram River, Borneo. 
Bagridae Hemibagrus baramensis (Regan, 1906) Fr native   24.00 cm SL male/unsexed   
Bagridae Hemibagrus bongan (Popta, 1904) Fr native    Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Bagridae Hemibagrus chrysops Ng & Dodson, 1999 Fr native    Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Type locality, Serian wet market, from Sadong R., Sarawak, Borneo (Ref. 46206). 
Bagridae Hemibagrus divaricatus Ng & Kottelat, 2013 Fr native   30.80 cm SL male/unsexed  Known from the Perak River drainage in western Peninsular Malaysia (Ref. 93057).  No picture yet.
Bagridae Hemibagrus fortis (Popta, 1904) Fr native    Found in Lanjak-Entimau Wildlife Sanctuary in Sarawak (Ref. 57780). 
Bagridae Hemibagrus furcatus Ng, Martin-Smith & Ng, 2000 Fr native   15.00 cm SL male/unsexed  Type locality, Sabah.  No picture yet.
Bagridae Hemibagrus gracilis Ng & Ng, 1995 Fr endemic   40.50 cm SL male/unsexed  Found in the upper stretches of Sungei Endau and Sungei Kinchin in the Endau-Rompin area at the border of the states of Johor and Pahang.  No picture yet.
Bagridae Hemibagrus hoevenii (Bleeker, 1846) Fr, Br native   35.00 cm SL male/unsexed  Known from Johor, Pahang and Muar basins.  No picture yet.
Bagridae Hemibagrus johorensis (Herre, 1940) Fr native    Found in Peninsular Malaysia (Ref. 58032).  No picture yet.
Bagridae Hemibagrus nemurus (Valenciennes, 1840) Fr, Br, Aq native  River catfish (English), Baung (Malay), Sopong (Malay)  65.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 27732, 36654. 
Bagridae Hemibagrus planiceps (Valenciennes, 1840) Fr native   33.50 cm TL male/unsexed   
Bagridae Hemibagrus sabanus (Inger & Chin, 1959) Fr native   20.00 cm SL male/unsexed  Recorded from lower Segama (Ref. 34011).  No picture yet.
Bagridae Hemibagrus semotus Ng & Kottelat, 2013 Fr native   19.88 cm SL male/unsexed  Known from Padas River drainage and the shorter coastal rivers draining the western face of the Crocker Range in northern Borneo, Sabah (Ref. 93057).  No picture yet.
Bagridae Hemibagrus wyckii (Bleeker, 1858) Fr native   90.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Gobiidae Hemigobius hoevenii (Bleeker, 1851) Fr, Br, M native   6.00 cm TL male/unsexed  Museum: Mangrove at Bamgangan, SW of Sandakan, Sabah, ZSM 27559 (Ref. 43716). Kabili River, North Borneo, CAS 33168 (Ref. 44011). 
Zenarchopteridae Hemirhamphodon byssus Tan & Lim, 2013 Fr native   7.13 cm SL male/unsexed  Known from the lowland stream systems in southern Sarawak that include Sematan, Lundu, Bau, Batu Kawa, Matang, Bako, Serian, Balai Ringin, Gedong and Sri Aman (Ref. 94086).  No picture yet.
Zenarchopteridae Hemirhamphodon kuekenthali Steindachner, 1901 Fr native  Halfbeak (English), Jolong Sarawak (Malay), Jolong-jolong (Malay)  7.00 cm SL male/unsexed  Restricted to Sarawak. Collected from the Baram River, the Kejin and Lawa tributaries. The streams were extensively shaded by overhanging vegetation or rock cliffs with no plants growing in the stream channels; gravel bottom except in Kejin where it is covered with organic debris, logs, leaves and tree bark (Ref. 26761). Also found in Rajang basin in Sarawak, Borneo (Ref. 57780). 
Zenarchopteridae Hemirhamphodon pogonognathus (Bleeker, 1853) Fr native   10.00 cm SL male/unsexed ;6.00 cm TL female  Known from Penang, Perak, Kuala Lumpur and Johore (Ref. 26761). 
Balitoridae Homaloptera ogilviei Alfred, 1967 Fr native   5.00 cm SL male/unsexed  Occurs in Malay Peninsula (Ref. 26580).  No picture yet.
Balitoridae Homaloptera orthogoniata Vaillant, 1902 Fr native   13.00 cm SL male/unsexed  Occurs in Malay Peninsula (Ref. 26580). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 7050. 
Balitoridae Homaloptera parclitella Tan & Ng, 2005 Fr native   10.02 cm SL male/unsexed    No picture yet.
Balitoridae Homalopteroides avii Randall & Page, 2014 Fr native   5.29 cm SL male/unsexed  Known from the Balui River and downstream of the Rajang River from Kapit, Rajang River basin in Sarawak (Ref. 96077).  No picture yet.
Balitoridae Homalopteroides nebulosus (Alfred, 1969) Fr native   3.60 cm SL male/unsexed  Occurs in Malay Peninsula (Ref. 26580) and Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Balitoridae Homalopteroides smithi (Hora, 1932) Fr native   9.80 cm TL male/unsexed  Occurs in the Malay Peninsula. Also Ref. 26580. 
Balitoridae Homalopteroides stephensoni (Hora, 1932) Fr native  fairly common (chances are about 50%) 6.50 cm SL male/unsexed  Recorded from Danum valley and Kuamut headwaters (Ref. 34011). 
Balitoridae Homalopteroides tweediei (Herre, 1940) Fr native   4.00 cm SL male/unsexed  Occurs in Malay Peninsula (Ref. 26580). 
Balitoridae Homalopteroides wassinkii (Bleeker, 1853) Fr native   6.50 cm TL male/unsexed  Known from Borneo and Sarawak (Ref. 26580). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Bagridae Hyalobagrus ornatus (Duncker, 1904) Fr native   3.00 cm SL male/unsexed  Known from the Muar drainage in southern Malay Peninsula (Ref. 33074). Also Ref. 7050. 
Gastromyzontidae Hypergastromyzon eubranchus Roberts, 1991 Fr native   3.60 cm SL male/unsexed  Known from Sarawak (Ref. 7050). Also Ref. 26580.  No picture yet.
Xenocyprididae Hypophthalmichthys molitrix (Valenciennes, 1844) Fr, Aq not established  Silver carp (English), Kap perak (Malay), Tongsan putih (Malay)  120 cm TL male/unsexed  Established in aquaculture through assisted/artificial reproduction. Not established in the wild. 
Xenocyprididae Hypophthalmichthys nobilis (Richardson, 1845) Fr, Fi, Aq not established  Bighead carp (English), Kap kepala besar (Malay), Tongsan (Malay)  146 cm SL male/unsexed  Introduced in the 1800s (Ref. 1739). Fingerlings were stocked in the Durian Tunggal, Paya Nakoh and Ampang reservoirs and aquaculture is widespread. It has established in aquaculture through assisted/artificial reproduction but not the wild (Ref. 1739). Also Ref. 13364. 
Hemiramphidae Hyporhamphus limbatus (Valenciennes, 1847) Fr, Br, M native  Congaturi halfbeak (English), Jolong birai hitam (Malay), Garfish (English), Halfbeak (English), Jolong-jolong (Malay), Langgai (Malay), Puput (Malay), Sembir (Malay), Todak (Malay), Todak pendek (Malay)  35.00 cm TL male/unsexed   
Loricariidae Hypostomus plecostomus (Linnaeus, 1758) Fr introduced   24.98 cm SL male/unsexed  A.G. Ponniah (pers. comm) July 2004. 
Cyprinidae Hypsibarbus malcolmi (Smith, 1945) Fr native   50.00 cm SL male/unsexed   
Cyprinidae Hypsibarbus pierrei (Sauvage, 1880) Fr native   36.90 cm TL male/unsexed  Known from Kelantan River. 
Syngnathidae Ichthyocampus carce (Hamilton, 1822) Fr, Br, M native  Freshwater pipefish (English), Undok-undok gonjeng (Malay), Pipefish (English), Undok-undok (Malay)  15.00 cm male/unsexed   
Pristigasteridae Ilisha megaloptera (Swainson, 1838) Fr, Br, M native  Bigeye ilisha (English), Puput beliak mata (Malay), Ilisha (English), Beliak mata (Malay), Bersia (Malay), Kapak (Malay), Kirang-kirang (Malay), Puput (Malay), Puput melaka (Malay), Tirok (Malay)  36.50 cm SL male/unsexed   
Indostomidae Indostomus paradoxus Prashad & Mukerji, 1929 Fr native   3.00 cm SL male/unsexed   
Gobiidae Istigobius diadema (Steindachner, 1876) Fr, Br native   10.00 cm SL male/unsexed   
Sciaenidae Johnius borneensis (Bleeker, 1851) Fr, Br, M native  Sharpnose hammer croaker (English), Gelama tukul (Malay), Croaker (English), Gelama (Malay), Hu lam (Malay), San gaa (Malay), Tengkerong (Malay)  34.80 cm TL male/unsexed  Also Ref. 5756. 
Sciaenidae Johnius coitor (Hamilton, 1822) Fr, Br, M native  Coitor croaker (English), Gelama Borneo (Malay), Croaker (English), Jewfish (English), Gelama (Malay), Gelama papan (Malay)  16.00 cm SL male/unsexed   
Sciaenidae Johnius trachycephalus (Bleeker, 1851) Fr, Br, M native  Leaftail croaker (English), Gelama ekor daun (Malay), Croaker (English), Gelama (Malay)  13.00 cm SL male/unsexed   
Gastromyzontidae Katibasia insidiosa Kottelat, 2004 Fr native   3.42 cm SL male/unsexed  Presently known only from Sungai [river] Katibas, a tributary of Rajang entering it at Song town in Sarawak (Ref. 54043). Also Ref. 57780.  No picture yet.
Ariidae Ketengus typus Bleeker, 1846 Fr, Br native  Bigmouth sea catfish (English), Duri kuning (Malay), Catfish (English), Soldier catfish (English), Duri (Malay), Lundu (Malay), Lundu kuning (Malay)  25.00 cm TL male/unsexed  Also Ref. 4833. 
Danionidae Kottelatia brittani (Axelrod, 1976) Fr native   5.00 cm TL male/unsexed  Museum: Johore River, CAS 35615.  
Cobitidae Kottelatlimia hipporhynchos Kottelat & Tan, 2008 Fr native   5.21 cm SL male/unsexed  Type locality, Borneo: Kalimantan Tengah: Kahayan drainage, blackwater stream at km 80 on road from Palangka Raya to Tumbang Telakian (35 km after turn-off at km 45 on road from Palangka Raya to Kasongan), MZB 10977 (holotype of Kottelatlimia hipporhynchos, 4.55 cm SL) (Ref. 79884).  No picture yet.
Cobitidae Kottelatlimia katik (Kottelat & Lim, 1992) Fr native   13.50 cm SL male/unsexed 1.3 SL Occurs in Malay Peninsura (Ref. 26580).  No picture yet.
Cobitidae Kottelatlimia pristes (Roberts, 1989) Fr native   4.00 cm SL male/unsexed  Know from Sarawak, Borneo (Ref. 13275) and Malay Peninsura (Ref. 26580). 
Siluridae Kryptopterus baramensis Ng, 2002 Fr native   24.88 cm SL male/unsexed  Known from the Baram River drainage in northern Borneo. Type locality, Sarawak, Sungai Akah, above Long Tebangan, 300 m below confluence with Sungai Pahang, below the falls,  No picture yet.
Siluridae Kryptopterus bicirrhis (Valenciennes, 1840) Fr, Fi native  common (usually seen) 15.00 cm SL male/unsexed  Common in Western Malaysia (Ref. 4835). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 2091, 27732. 
Siluridae Kryptopterus cryptopterus (Bleeker, 1851) Fr native   24.00 cm TL male/unsexed  Found in Malay Peninsula (Ref. 2091) and Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 27732, 36654. 
Siluridae Kryptopterus lais (Bleeker, 1851) Fr native   12.50 cm TL male/unsexed    No picture yet.
Siluridae Kryptopterus limpok (Bleeker, 1852) Fr native   26.00 cm SL male/unsexed  Collected from Peninsular Malaysia: Pahang, Sungai Bera, Tasek Bera, Tasak Chini; and Borneo: Sarawak (Ref. 42937). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Siluridae Kryptopterus macrocephalus (Bleeker, 1858) Fr, Fi native   9.70 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Siluridae Kryptopterus sabanus (Inger & Chin, 1959) Fr native   15.00 cm SL male/unsexed  Recorded from Danum Valley and lower Segama. Rare in the Segama river but abundant in the lower Segama from Kg. Bukit Belacong and downstream (Ref. 34011). Also Ref. 42932. 
Cyprinidae Labeo catla (Hamilton, 1822) Fr introduced  Pla kra ho (Malay) occasional (usually not seen) 182 cm TL male/unsexed  Released in Lake Chenderoh. Occasionally caught in the Perak river near the Chenderoh dam (Ref. 4835). 
Cyprinidae Labeo chrysophekadion (Bleeker, 1849) Fr native   90.00 cm TL male/unsexed  Occurs in the Malay Peninsula (Ref. 27732). Also Ref. 36654. 
Cyprinidae Labeo rohita (Hamilton, 1822) Fr not established  Rohu (Malay)  200 cm TL male/unsexed  Established in aquaculture through assisted/artificial reproduction. Has not established in the wild (Ref. 1739). 
Cyprinidae Labiobarbus fasciatus (Bleeker, 1853) Fr native   26.00 cm TL male/unsexed  Known from Pahang basin in southern Malay Peninsula. Also Ref. 7050.  No picture yet.
Cyprinidae Labiobarbus festivus (Heckel, 1843) Fr native   33.70 cm TL male/unsexed  Pahang, Selangor, Endau-Rompin and Johore.   No picture yet.
Cyprinidae Labiobarbus leptocheilus (Valenciennes, 1842) Fr native   30.00 cm SL male/unsexed  Occurs in the Malay Peninsula (Ref. 27732). Known from Borneo in Rejang and Kinabatangan river basins (Ref. 7424) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 36654. 
Cyprinidae Labiobarbus ocellatus (Heckel, 1843) Fr native   22.00 cm TL male/unsexed    No picture yet.
Cyprinidae Labiobarbus sabanus (Inger & Chin, 1962) Fr endemic   22.00 cm SL male/unsexed  Known from the Kinabatangan and Segama river basins in Sabah, northeastern Borneo (Ref. 7424). Also recorded from the Danum Valley and lower Segama. Only found in the main Segama river, never in the tributaries. Very common in the lower reaches of Segama but quite rare around Danum Valley Field Centre (Ref. 34011). Also Ref. 7050. 
Ailiidae Laides hexanema (Bleeker, 1852) Fr native   16.50 cm TL male/unsexed  Occurs in Malay Peninsula (Ref. 2091). Also Ref. 39209. 
Danionidae Laubuka laubuca (Hamilton, 1822) Fr native   10.54 cm TL male/unsexed  Also Ref. 36654, 41236. 
Bagridae Leiocassis collina Ng & Lim, 2006 Fr native   17.90 cm SL male/unsexed  Known from Kalabakan and Segama river drainages in Sabah, Borneo (Ref. 57084).  No picture yet.
Bagridae Leiocassis doriae Regan, 1913 Fr endemic    Found in Sarawak, Borneo (Ref. 37844). Also Ref. 6868.  No picture yet.
Bagridae Leiocassis hosii Regan, 1906 Fr native   15.80 cm SL male/unsexed  Recorded from Rajang River ar Sibu, Sarawak, Borneo (Ref. 57084). Type locality, Sibu, Sarawak state, Borneo, East Malaysia (Ref. 56787). 
Bagridae Leiocassis micropogon (Bleeker, 1852) Fr native   18.30 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Bagridae Leiocassis poeciloptera (Valenciennes, 1840) Fr native   17.00 cm SL male/unsexed   
Bagridae Leiocassis saravacensis Boulenger, 1894 Fr native   15.00 cm TL male/unsexed  Known from Borneo.  No picture yet.
Cobitidae Lepidocephalichthys berdmorei (Blyth, 1860) Fr native   8.00 cm SL male/unsexed  Occurs in Malay Peninsura (Ref. 26580). 
Cobitidae Lepidocephalichthys birmanicus (Rendahl, 1948) Fr native   11.00 cm male/unsexed   
Cobitidae Lepidocephalichthys hasselti (Valenciennes, 1846) Fr native   6.00 cm SL male/unsexed   
Cobitidae Lepidocephalus macrochir (Bleeker, 1854) Fr native   9.00 cm TL male/unsexed   
Leptobarbidae Leptobarbus hoevenii (Bleeker, 1851) Fr, Aq native  River carp (English), Jelawat (Malay)  100.00 cm SL male/unsexed   
Leptobarbidae Leptobarbus hosii (Regan, 1906) Fr native   8.50 cm TL male/unsexed    No picture yet.
Leptobarbidae Leptobarbus melanotaenia Boulenger, 1894 Fr native  occasional (usually not seen) 50.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Recorded from the Danum Valley. Found in deeper, slower water and is always rare, except for one location where it was found in schools of 20 or more. An extremely strong swimmer and good jumper (Ref. 34011). Also Ref. 2060. In Range Ref. 7050. 
Synanceiidae Leptosynanceia asteroblepa (Richardson, 1844) Fr, Br, M native  Mangrove stonefish (English), Depu-batu bintang (Malay), Scorpionfish (English), Depu (Malay), Lepu (Malay)  23.00 cm TL male/unsexed   
Cyprinidae Lobocheilos bo (Popta, 1904) Fr native  abundant (always seen in some numbers) 32.50 cm SL male/unsexed  Recorded from the Danum Valley, lower Segama and Kuamut headwaters. This dentrivorous species is extremely widespread and abundant in both the main Segama river and its tributaries. Larger individuals (up to 18.5 cm SL) are found in the main river while large school of up to 200 juveniles are common in shallow. fast flowing areas with gravel substrate (Ref. 34011). 
Cyprinidae Lobocheilos falcifer (Valenciennes, 1842) Fr native   33.50 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Recorded from Baram river (Ref. 2091). In range Ref. 7050. 
Cyprinidae Lobocheilos melanotaenia (Fowler, 1935) Fr native   20.00 cm SL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Cyprinidae Lobocheilos ovalis Kottelat & Tan, 2008 Fr native   15.84 cm SL male/unsexed  Known from the Rejang drainage in Sarawak to the Padas drainage in Sabah (Ref. 75626).  No picture yet.
Cyprinidae Lobocheilos terminalis Kottelat & Tan, 2008 Fr native   10.30 cm SL male/unsexed  Presently known only from Kinabatangan and Segama drainages in Sabah, Borneo (Ref. 75626).  No picture yet.
Cyprinidae Lobocheilos unicornis Kottelat & Tan, 2008 Fr native   30.00 cm SL male/unsexed  Known from the Segama drainage in Danum Valley, Sabah, Borneo (Ref. 75626).  No picture yet.
Osphronemidae Luciocephalus pulcher (Gray, 1830) Fr native  Tembok tebing (Malay)  20.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Recorded from Terengganu, Perak, Selangor, Pahang and Johor (Ref. 56386). 
Danionidae Luciosoma pellegrinii Popta, 1905 Fr native  common (usually seen) 17.00 cm TL male/unsexed  Recorded from the Danum Valley, lower Segama and Kuamut headwaters (Ref. 34011). 
Danionidae Luciosoma setigerum (Valenciennes, 1842) Fr native   26.00 cm SL male/unsexed  Known from Perak, Pahang, Malacca, and Negri Sembilan (Ref. 2091). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 7050. 
Danionidae Luciosoma spilopleura Bleeker, 1855 Fr native   25.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 4537. 
Danionidae Luciosoma trinema (Bleeker, 1852) Fr native   25.50 cm TL male/unsexed    No picture yet.
Lutjanidae Lutjanus argentimaculatus (Forsskål, 1775) Fr, Br, M, Fi, Aq, Lf native  Mangrove red snapper (English), Kakap merah (Malay), Grey snapper (English), Malabar red snapper (English), Mangrove jack (English), Mangrove snapper (English), Red snapper (English), Silver snapper (English), Silver-spotted grey snapper (English), Snapper (English), Ang choe (Malay), Ikan jenahak (Malay), Ikan merah (Malay), Ikan merah (Malay), Jambian (Malay), Jenahak (Malay), Jenahak temerah (Malay), Merah (Malay), Merah bakau (Malay), Sendarat (Malay), Siakap merah (Malay), Siakap tengak (Malay), Tamaing (Malay), Ungar (Malay)  150 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Lutjanidae Lutjanus maxweberi Popta, 1921 Fr, Br native   15.00 cm SL male/unsexed   
Engraulidae Lycothrissa crocodilus (Bleeker, 1850) Fr, Br native  Sabretoothed thryssa (English), Empirang sungai (Malay), Anchovy (English), Thryssa (English), Kasai (Malay), Mempurong (Malay), Purong (Malay)  30.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 36654 
Xenocyprididae Macrochirichthys macrochirus (Valenciennes, 1844) Fr native  Parang sungai (Malay)  100.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 4835, 7050. 
Mastacembelidae Macrognathus aculeatus (Bloch, 1786) Fr, Br native   38.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 2073. 
Mastacembelidae Macrognathus circumcinctus (Hora, 1924) Fr native   28.60 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 36654. 
Mastacembelidae Macrognathus keithi (Herre, 1940) Fr native  fairly common (chances are about 50%) 22.20 cm SL male/unsexed  Recorded from Danum Valley and Kuamut. Collected from small tributaries and from the main Segama river (Ref. 34011). Also known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref 84801. 
Mastacembelidae Macrognathus maculatus (Cuvier, 1832) Fr native  Ikan t'pachi (Malay)  28.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Osphronemidae Macropodus opercularis (Linnaeus, 1758) Fr native   6.70 cm SL male/unsexed  In Melaka. 
Synbranchidae Macrotrema caligans (Cantor, 1849) Fr, Br native    Found in Malay Peninsula. Type locality, Sea of Pinang [Penang] (Ref. 46206). 
Danionidae Malayochela maassi (Weber & de Beaufort, 1912) Fr native   4.00 cm SL male/unsexed  Known from Muar and Pahang (Ref. 2091).  No picture yet.
Mastacembelidae Mastacembelus armatus (Lacepède, 1800) Fr native   90.00 cm TL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Mastacembelidae Mastacembelus erythrotaenia Bleeker, 1850 Fr native   100.00 cm TL male/unsexed  Occurs in West Malaysia (Ref. 39392). 
Mastacembelidae Mastacembelus notophthalmus Roberts, 1989 Fr native   39.00 cm SL male/unsexed    No picture yet.
Mastacembelidae Mastacembelus unicolor Cuvier, 1832 Fr native   55.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Megalopidae Megalops cyprinoides (Broussonet, 1782) Fr, Br, M, Fi native  Indo-Pacific tarpon (English), Bulan bulan (Malay), Ladyfish (English), Moonfish (English), Tarpon (English), Banang (Malay), Banang pipih (Malay), Bandaran (Malay), Bulan (Malay), Bulan-bulan (Malay), Ikan bulan (Malay), Lian hu (Malay), Pipih (Malay)  150 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). Peak landings are in December (west coast and East Malaysia) and in September (east coast) (Ref. 27550). Also Ref. 5756, 9987. 
Siluridae Micronema hexapterus (Bleeker, 1851) Fr native   24.00 cm TL male/unsexed  Recorded from the Rajang River drainage, Sarawak (Ref. 50582). Also Ref. 57780. 
Siluridae Micronema platypogon (Ng, 2004) Fr native   17.63 cm SL male/unsexed  Type locality: Borneo: Sarawak, Rajang River drainage, market at Sibu (Ref. 50582). Also Ref. 57780.  No picture yet.
Centrarchidae Micropterus salmoides (Lacepède, 1802) Fr introduced   97.00 cm TL male/unsexed  Introduced by the Boh Tea Plantation Ltd., Cameron Highlands to revive their recreational program. About 1,000 fry were imported from Florida and raised in the Boh hatchery to fingerling size before being released in two lakes previously used for trout. Angling was permitted after one year and mature adults weighing about 300-350 g were caught. There were no reports of the same fish downstream of the lakes. Fish are presumed to be restricted to the lakes. 
Monodactylidae Monodactylus argenteus (Linnaeus, 1758) Fr, Br, M native  Silver moony (English), Bawal-bulan perak (Malay), Buttercream (English), Fingerfish (English), Kitefish (English), Moonfish (English), Silver batfish (English), Bat hu (Malay), Bawal perak (Malay), Bebulan (Malay), Gedabang (Malay), Nyior-nyior (Malay), Senyur (Malay)  27.00 cm SL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Synbranchidae Monopterus albus (Zuiew, 1793) Fr, Br native  Swamp eel (English), Belut (Malay)  100.00 cm SL male/unsexed  Known from the Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Recorded from Pulau Tioman. Young specimens (30-40 mm TL) were caught from among leaf litter in more stagnant sections of the stream, while larger specimens above 200 mm TL were caught from submerged bank vegetation (Ref. 41184). 
Mugilidae Mugil cephalus Linnaeus, 1758 Fr, Br, M native  Flathead mullet (English), Andapong (Malay), Bully mullet (English), Flathead grey mullet (English), Longaram mullet (English), Mangrove mullet (English), Mullet (English), Sea mullet (English), Anding (Malay), Belanak (Malay), Jempol (Malay), Jumpul (Malay), Kedera (Malay), Rapang (Malay)  100.00 cm SL male/unsexed   
Gobiidae Mugilogobius mertoni (Weber, 1911) Fr native   6.00 cm SL male/unsexed   
Gobiidae Mugilogobius rambaiae (Smith, 1945) Fr, Br native   4.15 cm SL male/unsexed   
Muraenesocidae Muraenesox cinereus (Forsskål, 1775) Fr, Br, M, Fi native  Daggertooth pike conger (English), Malong perak (Malay), Pike eel (English), Silver conger eel (English), Belut (Malay), Indong (Malay), Ketingkor (Malay), Malong (Malay), Muar hu (Malay), Nong (Malay), Tuna (Malay)  220 cm TL male/unsexed   
Xenocyprididae Mylopharyngodon piceus (Richardson, 1846) Fr questionable  Black carp (English), Kap hitam (Malay)  180 cm TL male/unsexed  Needs better reference. Probably introduced and not native. 
Cyprinidae Mystacoleucus marginatus (Valenciennes, 1842) Fr native  Sia (Malay), Masai (Malay)  20.00 cm TL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Bagridae Mystus armiger Ng, 2004 Fr, Br native   15.55 cm SL male/unsexed  Kelantan, Kelantan River at Kampung Kuala Besar.  No picture yet.
Bagridae Mystus castaneus Ng, 2002 Fr native   14.38 cm SL male/unsexed  Known from Johor, Kota Tinggi, Sungai Mupor and Sarawak, Borneo (Ref. 51149). Also Ref. 57780. 
Bagridae Mystus cavasius (Hamilton, 1822) Fr misidentification   40.00 cm SL male/unsexed  Reported to occur in Malaysia (Ref. 36654). Also Ref. 43640. 
Bagridae Mystus gulio (Hamilton, 1822) Fr, Br native   46.00 cm TL male/unsexed  Known from Selangor as Macrones gulio (Ref. 121464). 
Bagridae Mystus nigriceps (Valenciennes, 1840) Fr, Fi native   30.00 cm TL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 2091. 
Bagridae Mystus singaringan (Bleeker, 1846) Fr native   30.00 cm SL male/unsexed  Found in Pahang, Perak, and Johore (Ref. 10418). Also recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Museum: Pahang, ZRC 7979. Chendorah, Perak, ZRC 8178. Machap, Johore, ZRC 19415 (Ref. 10418). Also Ref. 27732. 
Bagridae Mystus vittatus (Bloch, 1794) Fr questionable  Baung (Malay)  21.00 cm SL male/unsexed  Occurrence needs confirmation as this species is known only from the Indian subcontinent (Ref. 26663). 
Bagridae Mystus wolffii (Bleeker, 1851) Fr native   20.00 cm TL male/unsexed   
Chaudhuriidae Nagaichthys filipes Kottelat & Lim, 1991 Fr native   3.10 cm SL male/unsexed    No picture yet.
Nandidae Nandus nandus (Hamilton, 1822) Fr questionable   20.00 cm TL male/unsexed   
Nandidae Nandus nebulosus (Gray, 1835) Fr, Br native   12.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 31543. 
Nandidae Nandus prolixus Chakrabarty, Oldfield & Ng, 2006 Fr native   8.34 cm SL male/unsexed  Known from the Sepilok River drainage in Sabah, northeastern Borneo (Ref. 57603).  No picture yet.
Bagridae Nanobagrus fuscus (Popta, 1904) Fr native   5.10 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Bagridae Nanobagrus lemniscatus Ng, 2010 Fr native    Found in Terengganu, northeastern Peninsular Malaysia (Ref. 85604). 
Bagridae Nanobagrus nebulosus Ng & Tan, 1999 Fr endemic   3.50 cm SL male/unsexed  Museum: Sungai Kahang and tributary, Johor, ZRC 42600 (holotype, 3.45 cm SL, female) (Ref. 36133). Status (Ref. 84801). 
Nemacheilidae Nemacheilus elegantissimus Chin & Samat, 1992 Fr native  scarce (very unlikely) 5.30 cm SL male/unsexed  Known from the riffles of Bole Kecil, Sapat Kalisun and Palum Tambun streams in Danum Valley, Sabah (Ref. 13354). Also recorded from Kuamut headwaters (Ref. 34011). Also occurs in Sarwak (Ref. 26580). 
Nemacheilidae Nemacheilus kapuasensis Kottelat, 1984 Fr native   71.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580.  No picture yet.
Nemacheilidae Nemacheilus longipectoralis Popta, 1905 Fr native   3.70 cm SL male/unsexed  Known from Borneo. 
Nemacheilidae Nemacheilus masyae Smith, 1933 Fr native   13.50 cm SL male/unsexed  Known from western Malaysia (Ref. 39226). Recorded from Endau drainage and extends southwards to the Endau basin (Ref. 36133) and Malay Peninsula (Ref. 26580). 
Nemacheilidae Nemacheilus olivaceus Boulenger, 1894 Fr native   6.70 cm SL male/unsexed  Recorded from Danum valley and Kuamut headwaters (Ref. 34011). Also Ref. 3310, 7050. 
Nemacheilidae Nemacheilus paucimaculatus Bohlen & Šlechtová, 2011 Fr native   6.15 cm SL male/unsexed  Found in three localities in the basins of Muar and Langat in Johor, Selangor and Negeri Sembilan in southern Peninsular Malaysia (Ref. 87792).  No picture yet.
Nemacheilidae Nemacheilus saravacensis Boulenger, 1894 Fr native   3.80 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580. 
Nemacheilidae Nemacheilus selangoricus Duncker, 1904 Fr native   5.90 cm SL male/unsexed  Occurs in Malay Peninsula and Sabah in north Borneo (Ref. 39226). Also Ref. 26580.  No picture yet.
Nemacheilidae Nemacheilus spiniferus Kottelat, 1984 Fr native   5.50 cm SL male/unsexed  Known from Borneo (Ref. 7050). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580.  No picture yet.
Danionidae Nematabramis alestes (Seale & Bean, 1907) Fr native  Dumpis (Malay)  10.10 cm SL male/unsexed   
Danionidae Nematabramis borneensis Inger & Chin, 1962 Fr native   10.20 cm SL male/unsexed  Recorded from the Danum Valley (Ref. 34011).  No picture yet.
Danionidae Nematabramis everetti Boulenger, 1894 Fr endemic  abundant (always seen in some numbers) 10.50 cm SL male/unsexed  Known from Baram river in Sarawak to Tawau in Sabah (Ref. 7050). Also recorded from the Danum Valley, lower Segama and Kuamut headwaters (Ref. 34011). Status (Ref. 84801). 
Danionidae Nematabramis steindachnerii Popta, 1905 Fr native  Dumpis (Malay)  11.20 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 3310.  No picture yet.
Cyprinidae Neobarynotus microlepis (Bleeker, 1851) Fr native   40.00 cm TL male/unsexed   
Gastromyzontidae Neogastromyzon chini Tan, 2006 Fr endemic   4.50 cm SL male/unsexed  Known from the hill streams in Rejang, Lupar and Sadong River basins in Sarawak (Ref. 57871).  No picture yet.
Gastromyzontidae Neogastromyzon crassiobex Tan, 2006 Fr native   4.87 cm SL male/unsexed  Known from the Kuamut drainage of the Kinabatangan River basin in eastern Sabah (Ref. 57871).  No picture yet.
Gastromyzontidae Neogastromyzon nieuwenhuisii Popta, 1905 Fr native   5.00 cm SL male/unsexed  Known from Sarawak. Also Ref. 26580.  No picture yet.
Gastromyzontidae Neogastromyzon pauciradiatus (Inger & Chin, 1961) Fr native   6.20 cm SL male/unsexed  Known from Rajang Basin in Sarawak, Borneo (Ref. 57780). Recorded from Kuamut headwaters (Ref. 34011). Also Ref. 26580. 
Balitoridae Neohomaloptera johorensis (Herre, 1944) Fr native   2.00 cm SL male/unsexed  Occurs in Malay Peninsula and Sarwak (Ref. 26580).  No picture yet.
Cyprinidae Neolissochilus hendersoni (Herre, 1940) Fr endemic    Type locality: Freshwater creek on Pinang [Penang] I., Malaysia (Ref. 33021). In range Ref. 26580. 
Cyprinidae Neolissochilus hexagonolepis (McClelland, 1839) Fr native   120 cm TL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Cyprinidae Neolissochilus soroides (Duncker, 1904) Fr native   45.00 cm TL male/unsexed   
Cyprinidae Neolissochilus tweediei (Herre & Myers, 1937) Fr native      No picture yet.
Phallostethidae Neostethus bicornis Regan, 1916 Fr, Br native   3.00 cm TL male/unsexed  Museum: Sarawak, Kuching, Sarawak River, N. shore at Kampung Tupong, USNM 325053 (Ref. 12769). Mangrove swamps on island opposite Sandakan, USNM 1189012. East Coast Residency, Kinabatangan Dist., FMNH 51726-51729 (Ref. 12768). 
Phallostethidae Neostethus borneensis Herre, 1939 Fr, Br native   2.30 cm SL male/unsexed  Museum: Kabili R., Sandakan Dist., North Borneo, CAS-SU 33018 (holotype, 1.65 cm SL, sinistral male); CAS-SU 33022, 33019; FMNH 51537-51538; BMNH 1938.12.1 (paratypes). Segaliud River, CAS-SU 69021, 33020. East Coast Residency, FMNH 51654. Mangrove swamps on island opposite Sandakan, USNM 189015 (Ref. 12768).  No picture yet.
Phallostethidae Neostethus lankesteri Regan, 1916 Fr, Br native   3.00 cm SL male/unsexed  Museum: Muar River, peninsular Malaysia, BMNH 1937.12.9. East Coast Residency, FMNH 51653. Sarawak, CAS-SU 61762 (Ref. 12768). 
Notopteridae Notopterus notopterus (Pallas, 1769) Fr native  Common knife fish (English), Belida (Malay) common (usually seen) 60.00 cm SL male/unsexed  Found virtually in all coastal river basins of peninsular Malaysia (Ref. 7431). 
Butidae Odonteleotris macrodon (Bleeker, 1853) Fr, Br, M native   27.80 cm SL male/unsexed   
Siluridae Ompok eugeneiatus (Vaillant, 1893) Fr native   16.50 cm TL male/unsexed    No picture yet.
Siluridae Ompok fumidus Tan & Ng, 1996 Fr, Br native   15.00 cm SL male/unsexed  Type locality: North Selengor peat swamp forest, 43 km on road from Tanjong Malim to Sungai Besar, Selangor, Malaysia. 
Siluridae Ompok hypophthalmus (Bleeker, 1846) Fr native   30.00 cm SL male/unsexed   
Siluridae Ompok jaynei Fowler, 1905 Fr, Br native   15.17 cm SL male/unsexed  Known from Baram River (Ref. 41243) and Rajang basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Siluridae Ompok leiacanthus (Bleeker, 1853) Fr native   19.00 cm TL male/unsexed    No picture yet.
Siluridae Ompok rhadinurus Ng, 2003 Fr native   21.44 cm SL male/unsexed  Known from Selangor, Johor, Pahang, Perak in Peninsular Malaysia (Ref. 52514). 
Siluridae Ompok siluroides Lacepède, 1803 Fr native   21.44 cm SL male/unsexed   
Salmonidae Oncorhynchus mykiss (Walbaum, 1792) Fr not established   122 cm TL male/unsexed   
Butidae Ophiocara porocephala (Valenciennes, 1837) Fr, Br, M native   34.00 cm TL male/unsexed  Recorded from Pulau Tioman, hiding amongst the submerged leaf litter along the bank and in brackish mangrove streams (Ref. 41184). 
Synbranchidae Ophisternon bengalense McClelland, 1844 Fr, Br native  Bengal eel (English), Belut-muara Benggala (Malay), Onegilled eel (English), Pygmy eel (English), Short-tailed eel (English), Swamp eel (English), Belut (Malay)  100.00 cm TL male/unsexed  In range Ref. 7050, 4833. 
Cichlidae Oreochromis mossambicus (Peters, 1852) Fr, Br, Fi, Aq introduced  Tilapia (Malay)  39.00 cm SL male/unsexed  Recorded from the lower Segama (Ref. 34011). Considered invasive, their numbers growing rapidly and often displacing native species particularly in rivers and lakes (Ref. 84801). Also Ref. 2, 3, 7306, 26920, 36683, 52307. 
Cichlidae Oreochromis niloticus (Linnaeus, 1758) Fr, Br, Aq introduced   60.00 cm SL male/unsexed  Considered invasive, their numbers growing rapidly and often displacing native species particularly in rivers and lakes (Ref. 84801). 
Adrianichthyidae Oryzias javanicus (Bleeker, 1854) Fr, Br native   4.50 cm TL male/unsexed   
Osphronemidae Osphronemus goramy Lacepède, 1801 Fr, Fi native  Giant gourami (English), Kalui (Malay)  70.00 cm SL male/unsexed   Recorded as having been or being farmed in rice fields (Ref. 119549). Also Ref. 9987. 
Osphronemidae Osphronemus laticlavius Roberts, 1992 Fr native  scarce (very unlikely) 50.00 cm SL male/unsexed  Known only from Sabah (Ref. 7425). Recorded from the Danum Valley (Ref. 34011). 
Osphronemidae Osphronemus septemfasciatus Roberts, 1992 Fr native   50.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Cyprinidae Osteochilus chini Karnasuta, 1993 Fr endemic  abundant (always seen in some numbers) 18.00 cm SL male/unsexed  Found in eastern Sabah, Borneo. Recorded from the Danum Valley, lower Segama and Kuamut headwaters (Ref. 34011). Status (Ref. 84801). 
Cyprinidae Osteochilus enneaporos (Bleeker, 1852) Fr native   23.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Cyprinidae Osteochilus flavicauda Kottelat & Tan, 2009 Fr native   9.64 cm SL male/unsexed  Found in Malay Peninsula (Ref. 82425).  No picture yet.
Cyprinidae Osteochilus harrisoni Fowler, 1905 Fr native   22.50 cm SL male/unsexed    No picture yet.
Cyprinidae Osteochilus ingeri Karnasuta, 1993 Fr endemic  abundant (always seen in some numbers) 11.00 cm SL male/unsexed  Found in Sabah, Borneo (Ref. 13275). Recorded from the Danum Valley, lower Segama and Kuamut. Less common than O. chini but still locally abundant and often sympatric with O. chini (Ref. 34011). Status (Ref. 84801). 
Cyprinidae Osteochilus intermedius Weber & de Beaufort, 1916 Fr native   15.50 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Cyprinidae Osteochilus kahajanensis (Bleeker, 1856) Fr native   22.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Cyprinidae Osteochilus melanopleura (Bleeker, 1852) Fr native   60.00 cm SL male/unsexed 26 Occurs in the Malay Peninsula (Chenderoh Dam, Perak; Kalantan) (Ref. 2091). Also recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 27732, 36654. 
Cyprinidae Osteochilus microcephalus (Valenciennes, 1842) Fr native   24.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). . Also Ref. 7050, 36654. 
Cyprinidae Osteochilus sarawakensis Karnasuta, 1993 Fr native    Known from northern Sarawak, Sabah, Borneo (Ref. 13275). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Cyprinidae Osteochilus scapularis Fowler, 1939 Fr native   18.44 cm SL male/unsexed  Known from Sarawak, Borneo (Ref. 81211).  No picture yet.
Cyprinidae Osteochilus spilurus (Bleeker, 1851) Fr native  Toros (Malay)  10.20 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 4835, 7050. 
Cyprinidae Osteochilus vittatus (Valenciennes, 1842) Fr native  Carp (English), Terbol (Malay), Terbui (Malay) abundant (always seen in some numbers) 32.00 cm SL male/unsexed  Occurs in the Malay Peninsula and Borneo (Ref. 27732). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Cyprinidae Osteochilus waandersii (Bleeker, 1853) Fr native   27.60 cm TL male/unsexed  Occurs in the Malay Peninsula and Borneo (Ref. 27732). Also recorded from the Danum Valley, lower Segama and Kuamut headwaters (Ref. 34011). 
Butidae Oxyeleotris marmorata (Bleeker, 1852) Fr, Br, Aq native  Marble goby (English), Ketutu (Malay), Goby (English), Bakut (Malay), Batutu (Malay), Belantuk (Malay), Belatok (Malay), Betutu (Malay), Ikan hantu (Malay)  65.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Butidae Oxyeleotris urophthalmoides (Bleeker, 1853) Fr native   19.80 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Butidae Oxyeleotris urophthalmus (Bleeker, 1851) Fr native   28.00 cm TL male/unsexed   
Xenocyprididae Oxygaster anomalura Van Hasselt, 1823 Fr native  Lalang (Malay)  20.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Paedocyprididae Paedocypris micromegethes Kottelat, Britz, Tan & Witte, 2006 Fr endemic   1.16 cm SL male/unsexed ;1.14 cm SL female  Known from Sarawak (Ref. 56152). 
Pangasiidae Pangasius djambal Bleeker, 1846 Fr native   90.00 cm TL male/unsexed   
Pangasiidae Pangasius kinabatanganensis Roberts & Vidthayanon, 1991 Fr native   23.80 cm SL male/unsexed  Known from Sabah (Ref. 13275).  No picture yet.
Pangasiidae Pangasius kunyit Pouyaud, Teugels & Legendre, 1999 Fr native   70.20 cm SL female  Recorded from Sabah in the Kinabatangan river. 
Pangasiidae Pangasius nasutus (Bleeker, 1863) Fr native   90.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7432. 
Pangasiidae Pangasius pangasius (Hamilton, 1822) Fr misidentification  River catfish (English), Lawang (Malay), Patin (Malay)  300 cm SL male/unsexed  Used to be cultured commercially in Malaysia (Ref. 7306). Report of this species in this region is based on a misidentification of Pangasius nasutus. 
Pangasiidae Pangasius polyuranodon Bleeker, 1852 Fr native   80.00 cm SL male/unsexed  Known from the Kapuas R. and in the Batang Rajang R., Sarawak and in Kinabatangan R., Sabah (Ref. 46915). Also Ref. 57780. 
Pangasiidae Pangasius sabahensis Gustiano, Teugels & Pouyaud, 2003 Fr native    Type locality, Sukau, Kinabatangan R., Sabah, North Borneo (Malaysia).  No picture yet.
Cobitidae Pangio agma (Burridge, 1992) Fr native   6.30 cm SL male/unsexed    No picture yet.
Cobitidae Pangio alcoides Kottelat & Lim, 1993 Fr endemic   3.93 cm SL male/unsexed  Found in Terengganu and Johor. Also Ref. 84801.  No picture yet.
Cobitidae Pangio anguillaris (Vaillant, 1902) Fr native   12.00 cm SL male/unsexed  Known from Pahang and Perak drainages (Ref. 13770). Also recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050, 27732, 26580. 
Cobitidae Pangio cuneovirgata (Raut, 1957) Fr native   6.00 cm SL male/unsexed  Known from Johor. Also Ref. 7050. 
Cobitidae Pangio doriae (Perugia, 1892) Fr native   9.00 cm TL male/unsexed  Known from Pahang and Sarawak, Borneo. Also Ref. 7050, 26580. 
Cobitidae Pangio filinaris Kottelat & Lim, 1993 Fr endemic   3.84 cm SL male/unsexed  Known from the Pahang basin and Terengganu. Also from Tersat river (Ref. 84801).  No picture yet.
Cobitidae Pangio incognito Kottelat & Lim, 1993 Fr native   2.99 cm SL male/unsexed  Presently known only from southern Sarawak, Borneo. Also Ref. 13275, 26580.  No picture yet.
Cobitidae Pangio kuhlii (Valenciennes, 1846) Fr native   12.00 cm TL male/unsexed  Known from Johor, Pahang, Selangor, Terengganu, Kedah and Sarawak in Borneo (Ref. 13770). In range Ref. 7050. 
Cobitidae Pangio malayana (Tweedie, 1956) Fr native   6.00 cm SL male/unsexed  Found in Johor, Pahang (Ref. 13770) and Malay Peninsura (Ref. 26580  No picture yet.
Cobitidae Pangio mariarum (Inger & Chin, 1962) Fr native   6.50 cm TL male/unsexed  Known from northern Borneo (Ref. 7050). Recorded from Danum valley and Kuamut headwaters (Ref. 34011). Also In Malay Peninsura (Ref. 26580). 
Cobitidae Pangio muraeniformis (de Beaufort, 1933) Fr, Br native   3.60 cm SL male/unsexed  Known from Pahang. Common in the leaf-litter at the mouth of small tributary streams along the Sungai Kinchin (Ref. 85353). Also Ref. 38745, 85309.  No picture yet.
Cobitidae Pangio oblonga (Valenciennes, 1846) Fr native   8.00 cm TL male/unsexed  Occurs in Malay Peninsula (Ref. 26580). 
Cobitidae Pangio piperata Kottelat & Lim, 1993 Fr native   5.21 cm SL male/unsexed  Found in West Malaysia from Johor to Terengganu (Ref. 13770). Also recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580.  No picture yet.
Cobitidae Pangio semicincta (Fraser-Brunner, 1940) Fr native    Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Cobitidae Pangio shelfordii (Popta, 1903) Fr native   8.00 cm TL male/unsexed  Occurs in Sarawak and Malay Peninsula (Ref. 2091, 13770, 26580). 
Tetraodontidae Pao leiurus (Bleeker, 1850) Fr native  Pufferfish (English), Buntal-gigi kelabu (Malay), Buntal (Malay)  16.00 cm male/unsexed   
Tetraodontidae Pao palembangensis (Bleeker, 1851) Fr native   19.40 cm SL male/unsexed  Known from Perak and Jahan River (Ref. 2091). 
Nemacheilidae Paracanthocobitis phuketensis (Klausewitz, 1957) Fr native   3.33 cm SL female  Known from the Oerlis, Padang Sarai, and Ketil drainages in Peninsular Malaysia (Ref. 117351).  No picture yet.
Xenocyprididae Parachela hypophthalmus (Bleeker, 1860) Fr native   16.50 cm TL male/unsexed   
Xenocyprididae Parachela maculicauda (Smith, 1934) Fr native   6.00 cm TL male/unsexed   
Xenocyprididae Parachela oxygastroides (Bleeker, 1852) Fr native  Lalang (Malay)  20.00 cm SL male/unsexed   
Cyprinidae Paracrossochilus acerus Inger & Chin, 1962 Fr native   9.50 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also recorded from the Kuamut headwaters. Found in large schools sympatrically with Garra borneensis (Ref. 34011). Also Ref. 3310, 7050. 
Cyprinidae Paracrossochilus vittatus (Boulenger, 1894) Fr native   7.50 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Akysidae Parakysis grandis Ng & Lim, 1995 Fr native   6.20 cm SL male/unsexed  Known from Sarawak, Borneo. Also Ref. 13847. 
Akysidae Parakysis longirostris Ng & Lim, 1995 Fr native   4.57 cm SL male/unsexed  Known from Sedili drainage of southeastern Johor. 
Akysidae Parakysis verrucosus Herre, 1940 Fr native   5.00 cm SL male/unsexed  Known from Peninsular Malaysia (Selangor, eastern Johor, Pahang and Terengganu). Also Ref. 7050, 13275. 
Xenocyprididae Paralaubuca typus Bleeker, 1864 Fr native   18.00 cm SL male/unsexed  Occurs in the Malay Peninsula. 
Ambassidae Parambassis apogonoides (Bleeker, 1851) Fr native   10.00 cm SL male/unsexed  Known from Pahang basin. Also Ref. 9497. 
Ambassidae Parambassis ranga (Hamilton, 1822) Fr native   9.50 cm TL male/unsexed  Also Ref. 4833, 41236, 43640. 
Ambassidae Parambassis siamensis (Fowler, 1937) Fr native   7.50 cm SL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Found in Perak rivers. 
Ambassidae Parambassis wolffii (Bleeker, 1850) Fr native   20.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Mugilidae Paramugil parmatus (Cantor, 1849) Fr, Br, M native  Broad-mouthed mullet (English), Belanak mulut lebar (Malay), Mullet (English), Belanak (Malay)  30.00 cm TL male/unsexed   
Gobiidae Parawaous megacephalus (Fowler, 1905) Fr native   7.40 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Gastromyzontidae Parhomaloptera microstoma (Boulenger, 1899) Fr native   8.80 cm TL male/unsexed  Recorded from Danum valley and Kuamut headwaters. Has a patchy distribution and very abundant in Kuamut headwater streams (Ref. 34011). Also found in Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050. 
Osphronemidae Parosphromenus alfredi Kottelat & Ng, 2005 Fr native   2.57 cm SL male/unsexed  Known only from eastern Johor, in the area of Kota Tinggi, Mawai and Desaru (Ref. 56232). The type locality near Desaru is now basically an oil palm estate and the stream has been used for irrigation (Ref. 56232). ). 
Osphronemidae Parosphromenus allani Brown, 1987 Fr native   3.50 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Osphronemidae Parosphromenus harveyi Brown, 1987 Fr native    Type locality: West side of Peninsula Malaysia (Ref. 33021); in North Selangor (Ref. 42706). 
Osphronemidae Parosphromenus nagyi Schaller, 1985 Fr, Or endemic   4.00 cm TL male/unsexed  Reported from Pahang, Kuantan (Ref. 84801). Exported for aquarium trade. 
Osphronemidae Parosphromenus paludicola Tweedie, 1952 Fr native   3.70 cm TL male/unsexed   
Osphronemidae Parosphromenus rubrimontis Kottelat & Ng, 2005 Fr native   2.47 cm SL male/unsexed  Found in Perak (Ref. 56232).  No picture yet.
Osphronemidae Parosphromenus tweediei Kottelat & Ng, 2005 Fr native   2.51 cm SL male/unsexed  Known from western Johor (Ref. 56232). 
Pristigasteridae Pellona ditchela Valenciennes, 1847 Fr, Br, M, Fi native  Indian pellona (English), Beliak mata (Malay), Herring (English), Sardine (English), Shad (English), Belalak (Malay), Bersia (Malay), Garan-garan (Malay), Kirang-kirang (Malay), Puput (Malay), Tirok (Malay)  16.00 cm SL male/unsexed   
Oxudercidae Periophthalmus argentilineatus Valenciennes, 1837 Fr, Br, M native   19.00 cm TL male/unsexed  Recorded from Pulau Tioman, in rocky freshwater streams and brackish water (Ref. 41184). 
Siluridae Phalacronotus apogon (Bleeker, 1851) Fr native   130 cm SL male/unsexed  Occurs in Malay Peninsula and Borneo (Ref. 27732). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Siluridae Phalacronotus micronemus (Bleeker, 1846) Fr native   50.00 cm SL male/unsexed   
Siluridae Phalacronotus parvanalis (Inger & Chin, 1959) Fr native   35.00 cm SL male/unsexed  Recorded from Danum Valley (rare) and lower Segama (abundant) (Ref. 34011). 
Phallostethidae Phallostethus dunckeri Regan, 1913 Fr endemic    Found in Malay peninsula (Ref. 90869). Museum: mouth of Muar River, Johore, ZMH 193 - 195; BMNH 1913.5.24 (Ref. 12768). Also Ref. 3881.  No picture yet.
Phallostethidae Phenacostethus posthon Roberts, 1971 Fr, Br native   1.80 cm SL male/unsexed  Museum: Muar R., Johore, USNM 229302 (Ref. 12768).  No picture yet.
Phallostethidae Phenacostethus smithi Myers, 1928 Fr, Br native   2.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Museum: Trengganu, USNM 266124. Johore, USNM 266125 - 27 (Ref. 12768). 
Phallostethidae Phenacostethus trewavasae Parenti, 1986 Fr native   1.41 cm SL male/unsexed  Found in tributaries of Baram River, Sarawak. Museum: Sungei Kejin Tugang, tributary of Sunger Kejin, Baram R., Sarawak, ROM 41826 (holotype, 1.41 cm SL, male); ROM 44289, CS812, 41827 (paratypes). Sungei Kejin, station at confluence of Kejin Tugang and Kejin R., Baram R., Sarawak, ROM 41829, 41830; CAS 55454; BMNH 1984.7.12:1-5; AMNH 55570; USNM 267266 (Ref. 12768). Also Ref. 13221.  No picture yet.
Mugilidae Planiliza melinoptera (Valenciennes, 1836) Fr, Br native  Otomebora mullet (English), Belanak perak (Malay), Mullet (English), Belanak (Malay), Kedera (Malay)  30.00 cm SL male/unsexed  Known from Selangor (Ref. 121464). 
Mugilidae Planiliza planiceps (Valenciennes, 1836) Fr, Br, M native  Tade mullet (English), Belanak tade (Malay), Grey mullet (English), Mullet (English), Tade grey mullet (English), Belanak (Malay), Belanak jempol (Malay), Belanak tamuk (Malay), Jempol (Malay), Jempul (Malay), Kedera (Malay), Tamuk (Malay)  70.00 cm TL male/unsexed  Known from Penang and Malacca (Ref. 2830). 
Mugilidae Planiliza subviridis (Valenciennes, 1836) Fr, Br, M native  Greenback mullet (English), Belanak anding (Malay), Greenback grey mullet (English), Grey mullet (English), Mullet (English), Andang (Malay), Anding (Malay), Belanak (Malay), Belanak bakau (Malay), Belanak rapang (Malay), Belanak serong ekor (Malay), Kambura (Bajau) (Malay), Kedera (Malay), Kemurak (Malay), Loban (Malay), Rampang (Malay), Serong (Malay), Serong ekor (Malay)  40.00 cm SL male/unsexed   
Plotosidae Plotosus canius Hamilton, 1822 Fr, Br, M native  Gray eel-catfish (English), Semilang (Malay), Barbel-eel catfish (English), Eel catfish (English), Gemang (Malay), Kelara (Malay), Sembilang gemang (Malay), Semibilang (Malay), Semilang batu (Malay), Semilang karang (Malay), Senangin (Malay), Thor sart (Malay), Unsat (Malay), Unsat-unsat (Malay)  111 cm TL male/unsexed  Also Ref. 48635. 
Poeciliidae Poecilia reticulata Peters, 1859 Fr introduced   5.00 cm SL male/unsexed ;6.00 cm SL female   
Polynemidae Polydactylus luparensis Lim, Motomura & Gambang, 2010 Fr native  Sarawak Giant Threadfin (English), Gemian (Malay)  72.00 cm SL male/unsexed  Borneo 
Polynemidae Polynemus dubius Bleeker, 1853 Fr, Br native  Eastern paradise fish (English), Senangin-bulu (Malay), Tasselfish (English), Kubal (Malay), Kurau (Malay), Kurau janggut (Malay), Mancong (Malay), Senangin (Malay)  20.00 cm SL male/unsexed  Known from the Kangsar and Muar Rivers (western Malaysia in Malay Peninsula) (Ref. 49954, 57343). Also Ref. 9685. 
Polynemidae Polynemus hornadayi Myers, 1936 Fr, Fi native   19.50 cm SL male/unsexed  Currently known the Ensengi, Rajang, and Sungai rivers in western Sarawak, Kalimantan (Ref. 9685). Esteemed food fish in western Sarawak, Kalimantan, Malaysia (Ref. 57343). Also Ref. 57780. 
Polynemidae Polynemus melanochir Valenciennes, 1831 Fr, Br native  Blackhand paradise fish (English), Senangin-bulu sirip hitam (Malay), Indian threadfin (English), Ikan bulu (Malay), Kubal (Malay), Kurau (Malay), Kurau janggut (Malay), Mancong (Malay), Senangin (Malay)  25.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Type locality, Kuching Bay, Sarawak, Kalimantan (Ref. 43351). 
Cyprinidae Poropuntius birtwistlei (Herre, 1940) Fr native    Type locality: Chenderoh Dam, Perak, Malaysia (Ref. 33021). In range Ref. 26580.  No picture yet.
Cyprinidae Poropuntius normani Smith, 1931 Fr native   13.00 cm SL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Cyprinidae Poropuntius smedleyi (de Beaufort, 1933) Fr native   13.50 cm SL male/unsexed  Type locality: Jahore, s. Malay Peninsula, Malasia (Ref. 33021). In range Ref. 26580.  No picture yet.
Pristidae Pristis microdon Latham, 1794 Fr, Br, M native  Largetooth sawfish (English), Pari-gergaji seragam (Malay), Freshwater sawfish (English), Great-toothed sawfish (English), Sawfish (English), Beroi (Malay), Kan sua (Malay), Yu beroi (Malay), Yu gergaji (Malay), Yu parang (Malay), Yu todak (Malay)  700 cm TL male/unsexed  . 
Pristidae Pristis zijsron Bleeker, 1851 Fr, Br, M native  Longcomb sawfish (English), Pari-gergaji silih (Malay), Green sawfish (English), Beroi (Malay), Kan sua (Malay), Yu beroi (Malay), Yu gergaji (Malay), Yu parang (Malay), Yu todak (Malay)  730 cm TL male/unsexed   
Pristolepididae Pristolepis fasciata (Bleeker, 1851) Fr native   31.00 cm TL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 36654. 
Pristolepididae Pristolepis grootii (Bleeker, 1852) Fr native  Malaysian leaf fish (English), Kepor (Malay)  18.40 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Cyprinidae Probarbus jullieni Sauvage, 1880 Fr, Br, Fi native  Giant river carp (English), Temelian (Malay), Temoleh (Malay) scarce (very unlikely) 150 cm SL male/unsexed  Known from Perak (Sg. Perak and Lake Chenderoh) and Pahang (Kuala Tahan and Taman Negara). Largest species of cyprinids in Peninsular Malaysia. Perak population extirpated due to construction of Chenderoh dam in 1930 (Ref. 7429). 
Gastromyzontidae Protomyzon aphelocheilus Inger & Chin, 1962 Fr native  scarce (very unlikely) 4.20 cm SL male/unsexed  Known from northern Borneo. Recorded from Danum valley (Ref. 34011).  No picture yet.
Gastromyzontidae Protomyzon borneensis Hora & Jayaram, 1952 Fr native   5.40 cm SL male/unsexed  Known from northern Borneo (Ref. 7050).  No picture yet.
Gastromyzontidae Protomyzon griswoldi (Hora & Jayaram, 1952) Fr native  occasional (usually not seen) 6.80 cm SL male/unsexed  Known from northern Borneo (Ref. 7050). Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also found in Danum valley and Kuamut headwaters (Ref. 34011). Also Ref. 84801. 
Gastromyzontidae Protomyzon whiteheadi (Vaillant, 1893) Fr native   5.00 cm SL male/unsexed  Known from northern Borneo (Ref. 7050). Recorded from Danum valley and Kuamut headwaters. Found sympatrically with P. griswoldi (Ref. 34011). 
Oxudercidae Pseudapocryptes borneensis (Bleeker, 1855) Fr native   12.00 cm TL male/unsexed   
Oxudercidae Pseudapocryptes elongatus (Cuvier, 1816) Fr, Br, M native  Belacak (Malay), Ikan tembakul (Malay)  20.00 cm TL male/unsexed  Also Ref. 5756. 
Akysidae Pseudobagarius alfredi (Ng & Kottelat, 1998) Fr endemic   3.00 cm SL male/unsexed  Presently known only from Tasek Bera in Pahang. 
Gobiidae Pseudogobiopsis festiva Larson, 2009 Fr native   3.45 cm SL male/unsexed   
Gobiidae Pseudogobiopsis oligactis (Bleeker, 1875) Fr native   6.00 cm TL male/unsexed  Found in Sarawak, Borneo (Ref. 13275). Museum: Chanderoh Dam, Perak, CAS 32975 (holotype of Vaimosa perakensis, 2.55 cm SL) (Ref. 43716). 
Gobiidae Pseudogobiopsis paludosa (Herre, 1940) Fr native   3.05 cm SL male/unsexed  Museum: 5 miles north of Kota Tinggi, Johore, CAS 32998 (holotype, 3.05 cm SL) (Ref. 43716). 
Gobiidae Pseudogobius melanosticta (Day, 1876) Fr, Br native   4.00 cm SL male/unsexed  Collected from Trengganu (Ref. 126575).  No picture yet.
Gobiidae Pseudogobius poicilosoma (Bleeker, 1849) Fr, Br native   6.50 cm TL male/unsexed  Recorded from Pulau Tioman, among submerged roots in a rocky freshwater pool and mangrove streams (Ref. 41184). 
Balitoridae Pseudohomaloptera leonardi (Hora, 1941) Fr native   6.50 cm SL male/unsexed  Occurs in Malay Peninsula (Ref. 26580). Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Balitoridae Pseudohomaloptera tatereganii (Popta, 1905) Fr native   8.50 cm TL male/unsexed    No picture yet.
Pangasiidae Pseudolais micronemus (Bleeker, 1846) Fr native   100.00 cm male/unsexed  Recorded from the lower Segama and Danum Valley (Ref. 34011) and Rajang Basin in Sarawak, Borneo (Ref. 57780). It may be migratory as local people report it to be caught at particular times of the year (Ref. 34011). 
Bagridae Pseudomystus fumosus Ng & Lim, 2005 Fr native   7.36 cm SL male/unsexed  Found in the upper Pahang River drainage in eastern Peninsular Malaysia (Ref. 54514).  No picture yet.
Bagridae Pseudomystus inornatus (Boulenger, 1894) Fr native   14.50 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780).  No picture yet.
Bagridae Pseudomystus leiacanthus (Weber & de Beaufort, 1912) Fr native   6.20 cm SL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Bagridae Pseudomystus robustus (Inger & Chin, 1959) Fr native   25.00 cm SL male/unsexed  Recorded from lower Segama (Ref. 34011).  No picture yet.
Bagridae Pseudomystus stenomus (Valenciennes, 1840) Fr native   12.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Osphronemidae Pseudosphromenus cupanus (Cuvier, 1831) Fr native   7.50 cm TL male/unsexed   
Gobiidae Pseudotrypauchen multiradiatus Hardenberg, 1931 Fr native   9.01 cm SL male/unsexed  Specimens collected from the Strait of Malacca SW of Penang. Also from Ref. 92840.  No picture yet.
Siluridae Pterocryptis cochinchinensis (Valenciennes, 1840) Fr native   40.10 cm TL male/unsexed   
Siluridae Pterocryptis furnessi (Fowler, 1905) Fr native   17.50 cm TL male/unsexed  Known from the Niah and Baram drainages of Sarawak, Borneo. Found in caves of Mulu National Park, Sarawak (Ref. 7050). 
Loricariidae Pterygoplichthys pardalis (Castelnau, 1855) Fr introduced   57.80 cm TL male/unsexed  Recorded from Langat River (Ref. 57029). Has firmly established in polluted urban lakes and rivers (Ref. 84801). Also Ref. 58503. 
Cyprinidae Puntigrus partipentazona (Fowler, 1934) Fr native   6.00 cm TL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Cyprinidae Puntigrus tetrazona (Bleeker, 1855) Fr native   7.00 cm TL male/unsexed   
Cyprinidae Puntioplites bulu (Bleeker, 1851) Fr native  Ikan temelian (Malay), Tengalan (Malay)  44.30 cm TL male/unsexed  Recorded from the Danum Valley and Kuamut headwaters (Ref. 34011). Also found in Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Cyprinidae Puntioplites proctozystron (Bleeker, 1865) Fr native   44.00 cm TL male/unsexed   
Cyprinidae Puntioplites waandersi (Bleeker, 1859) Fr native   50.00 cm TL male/unsexed   
Cyprinidae Puntius brevis (Bleeker, 1849) Fr native   14.00 cm TL male/unsexed  Occurs in the Malay Peninsula (Ref. 27732). 
Cyprinidae Puntius sealei (Herre, 1933) Fr native  Turungau (Malay) common (usually seen) 13.70 cm TL male/unsexed  Recorded from the Danum Valley, lower Segama and Kuamut headwaters. Most common cyprinid species around Danum Valley Field Centre, fond in all stream systems with slow-moving water, attaining high abundance in the absence of other species (schools of more than 200 individuals have been observed). Dispersal abilities very good, populations being established in stagnant roadside pools and above waterfalls, including substantial series of falls at Maliau Basin Conservation Area (Ref. 34011). 
Danionidae Raiamas guttatus (Day, 1870) Fr native   30.00 cm SL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 4832. 
Danionidae Rasbora argyrotaenia (Bleeker, 1849) Fr native  Buntung (Malay), Londoi (Malay)  14.00 cm TL male/unsexed  Recorded from the lower Segama and Kuamut headwaters (Ref. 34011). Also found in Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580. 
Danionidae Rasbora aurotaenia Tirant, 1885 Fr native   15.00 cm SL male/unsexed   
Danionidae Rasbora bankanensis (Bleeker, 1853) Fr native   6.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580. 
Danionidae Rasbora borapetensis Smith, 1934 Fr native   10.00 cm TL male/unsexed   
Danionidae Rasbora borneensis Bleeker, 1860 Fr native   8.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Danionidae Rasbora caudimaculata Volz, 1903 Fr native   17.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Museum: Johore, Mawai Dist., CAS-SU 34644. Also Ref. 26580. 
Danionidae Rasbora cephalotaenia (Bleeker, 1852) Fr native   13.00 cm TL male/unsexed  Occurs in Sarwak (Ref. 26580). 
Danionidae Rasbora chrysotaenia Ahl, 1937 Fr native   3.50 cm TL male/unsexed    No picture yet.
Danionidae Rasbora cryptica Kottelat & Tan, 2012 Fr native    Found in Serian, stream at 0.25 km towards Kampung Lanchang, tributary of Sungai Kuhas, 6.9 km left at Tebelu Tebakang turnoff, 5.8 km into right trail in Sarawak, Borneo (Ref. 94476).  No picture yet.
Danionidae Rasbora daniconius (Hamilton, 1822) Fr native   15.00 cm TL male/unsexed   
Danionidae Rasbora dusonensis (Bleeker, 1850) Fr native   12.00 cm SL male/unsexed  Found in Perak (Ref. 2091) and Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 27732, 36654. 
Danionidae Rasbora einthovenii (Bleeker, 1851) Fr native   9.00 cm TL male/unsexed  Known in Johore, Labuan, Sandakan. Also Ref. 26580. 
Danionidae Rasbora elegans Volz, 1903 Fr native   20.00 cm SL male/unsexed  Occurs in Sarwak (Ref. 26580). Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Danionidae Rasbora ennealepis Roberts, 1989 Fr native   4.50 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Danionidae Rasbora hubbsi Brittan, 1954 Fr endemic  common (usually seen) 5.00 cm TL male/unsexed  Recorded from the Danum Valley (Ref. 34011). Status (Ref. 84801). Museum records: Lahad Datu River, Sabah State, Borneo, CAS 117477, Holotype; Balung River near Tawan, Sabah State (Borneo), CAS 115367 (Ref. 13215). 
Danionidae Rasbora kalochroma (Bleeker, 1851) Fr native   10.00 cm TL male/unsexed  Known in Johore, Trengganu, Kuching in Borneo.  
Danionidae Rasbora kottelati Lim, 1995 Fr native   6.97 cm SL male/unsexed  Known from Sarawak in Rajang basin around Sibu and Baram basin, Marudi (Ref. 13217). Also Ref. 13275, 26580, 57780.  No picture yet.
Danionidae Rasbora lateristriata (Bleeker, 1854) Fr native   12.00 cm TL male/unsexed   
Danionidae Rasbora meinkeni de Beaufort, 1931 Fr questionable   3.90 cm SL male/unsexed  Occurrence uncertain. 
Danionidae Rasbora notura Kottelat, 2005 Fr native   7.16 cm SL male/unsexed  Known from Terengganu drainage on the Gulf of Thailand slope of Peninsula Malaysia (Ref. 55979).  No picture yet.
Danionidae Rasbora paucisqualis Ahl, 1935 Fr native   4.00 cm SL male/unsexed   
Danionidae Rasbora rasbora (Hamilton, 1822) Fr questionable   13.00 cm TL male/unsexed   
Danionidae Rasbora rheophila Kottelat, 2012 Fr native    Known from Sungai Pangakatan (tributary of Sungai Liwagu), near Ranau on road to hot spring in Sabah, Borneo (Ref. 94476).  No picture yet.
Danionidae Rasbora rutteni Weber & de Beaufort, 1916 Fr native   4.30 cm SL male/unsexed   
Danionidae Rasbora sarawakensis Brittan, 1951 Fr native   4.52 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Museum: Sarawak, CAS-SU 15375 (Holotype, brook 16 miles east of Kuching); CAS-SU 33593 (Paratypes) (Ref. 2091). 
Danionidae Rasbora semilineata Weber & de Beaufort, 1916 Fr native   3.70 cm SL male/unsexed    No picture yet.
Danionidae Rasbora sumatrana (Bleeker, 1852) Fr native  Seluang (Malay) common (usually seen) 13.00 cm TL male/unsexed  Recorded from the Danum Valley and Kuamut headwaters (Ref. 34011). Also Ref. 36654. 
Danionidae Rasbora tornieri Ahl, 1922 Fr native   17.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 12693, 26580. 
Danionidae Rasbora trifasciata Popta, 1905 Fr native   5.90 cm SL male/unsexed    No picture yet.
Danionidae Rasbora trilineata Steindachner, 1870 Fr native  Bada (Malay), Seluang (Malay)  13.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Museum: Johore, Kota Tinggi, CAS-SU 47235; Ayer Hitam, CAS-SU 15343; Pengulon Patie, NMW 51458-61(Ref. 2091). Also Ref. 26580, 27732, 36654. 
Danionidae Rasbora tubbi Brittan, 1954 Fr native   10.30 cm SL male/unsexed   
Danionidae Rasbora tuberculata Kottelat, 1995 Fr native   2.68 cm SL male/unsexed  Known from Sungai Serait in Sarawak, Borneo.  No picture yet.
Danionidae Rasbora volzii Popta, 1905 Fr native   12.60 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Museum: Sarawak, 16 miles E of Kuching, CAS-SU 33592 (Ref. 2091). 
Danionidae Rasbora vulgaris Duncker, 1904 Fr native   7.81 cm SL male/unsexed  Recorded from Selangor, Kuala Lumpur; and Malaca, Penang (Ref. 94947). Type locality, Kuala Lumpur, Malaysia (Ref. 81932).  No picture yet.
Xenocyprididae Rasborichthys helfrichii (Bleeker, 1856) Fr native   9.40 cm SL male/unsexed   
Gobiidae Redigobius balteatus (Herre, 1935) Fr native   3.80 cm SL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Gobiidae Redigobius bikolanus (Herre, 1927) Fr native   4.90 cm TL male/unsexed  Known in North Borneo. Recorded from Pulau Tioman (Ref. 41184). 
Cyprinidae Rohteichthys microlepis (Bleeker, 1850) Fr native   30.00 cm SL male/unsexed   
Cyprinidae Schismatorhynchos holorhynchos Siebert & Tjakrawidjaja, 1998 Fr native   14.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also recorded from the Kuamut headwater streams (Ref. 34011). Type locality: Confluence of Batang Balui and Batang Kerumo, Sarawak (Ref. 33021).  No picture yet.
Nemacheilidae Schistura balteata (Rendahl, 1948) Fr native   5.40 cm SL male/unsexed  Occurs in Malay Peninsula. 
Nemacheilidae Schistura desmotes (Fowler, 1934) Fr native   6.70 cm SL male/unsexed  Occurs in Malay Peninsula (Ref. 26580).  No picture yet.
Osteoglossidae Scleropages formosus (Müller & Schlegel, 1840) Fr native  Asian bonytongue (English), Dragon fish (English), Sclerapages (English), Baju rantai (Malay), Kelesa (Malay)  90.00 cm TL male/unsexed 37.5 TL Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 4789, 36654. 
Engraulidae Setipinna melanochir (Bleeker, 1849) Fr, Br, M native  Dusky-hairfin anchovy (English), Empirang sirip gelap (Malay), Hairfin anchovy (English), Bersia (Malay), Biang-biang (Malay), Bilis (Malay), Empirang (Malay), Ikan kucing (Malay), Jelebat (Malay), Kasai janggut (Malay), Mempurong (Malay), Puput (Malay)  33.00 cm SL male/unsexed  Caught by gill net only in the lower reaches of the Segama river (Ref. 34011). Also Ref. 36654. 
Cyprinidae Sikukia stejnegeri Smith, 1931 Fr native   12.00 cm TL male/unsexed   
Sillaginidae Sillago sihama (Fabricius, 1775) Fr, Br, M, Fi native  Silver sillago (English), Puntung-damar perak (Malay), Indian whiting (English), Sand border (English), Sillago-whiting (English), Sillago-whitings (English), Silver whiting (English), Trumpeter whiting (English), Bangalus (Malay), Bebolos (Malay), Bebulus (Malay), Beritus (Malay), Bulus (Malay), Bulus-bulus (Malay), Bunus (Malay), Kedondong-kedondong (Malay), Punting damar (Malay), Puntung damar (Malay), Puting damar (Malay), Suar chiam (Malay), Suar chooi (Malay), Ubi (Malay), Usus (Malay)  31.00 cm SL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Siluridae Silurichthys hasseltii Bleeker, 1858 Fr native   11.00 cm TL male/unsexed  Known from southern Peninsular Malaysia (Johor, Pahang) (Re. 32835). Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Siluridae Silurichthys indragiriensis Volz, 1904 Fr native   10.54 cm SL male/unsexed  Known from Peninsular Malaysia (Johor, Selangor, Perak and Trengganu). 
Siluridae Silurichthys marmoratus Ng & Ng, 1998 Fr native   10.36 cm SL male/unsexed  Known from Sarawak, Borneo.  No picture yet.
Siluridae Silurichthys phaiosoma (Bleeker, 1851) Fr native   15.00 cm SL male/unsexed  Known from Sarawak, Borneo (Ref. 32835). Also Ref. 7050, 57780. 
Siluridae Silurichthys schneideri Volz, 1904 Fr native   16.00 cm SL male/unsexed  Known from northern Peninsular Malaysia. Also Ref. 7050. 
Nemacheilidae Speonectes tiomanensis (Kottelat, 1990) Fr endemic  scarce (very unlikely) 5.82 cm SL male/unsexed  Type locality: Cave in Mount Gunung Kajang, Pulau Tioman, Malaysia, elev. 2900 ft. Recorded from Pulau Tioman (Ref. 41184). Status (Ref. 84801). Also Ref. 3881, 27299.  No picture yet.
Osphronemidae Sphaerichthys osphromenoides Canestrini, 1860 Fr native   6.00 cm TL male/unsexed  Found in blackwater peat swamp in North Selangor (Ref. 42706). Also found in Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 4835. 
Gobiidae Stenogobius ingeri Watson, 1991 Fr native   6.87 cm SL male/unsexed ;6.29 cm SL female  Known from Sabah in northeastern Borneo (Ref. 34009). Also Ref. 7050.  No picture yet.
Gobiidae Stigmatogobius pleurostigma (Bleeker, 1849) Fr native   6.40 cm SL male/unsexed  Known from Selangor and Sarawak (Ref. 56945). 
Gobiidae Stigmatogobius sadanundio (Hamilton, 1822) Fr, Br native  Goby (English), Belodok kerapu (Malay), Belukor (Malay)  9.00 cm SL male/unsexed  Type locality of Gobius apogonius: Pinanag (Ref. 43716). 
Gobiidae Stigmatogobius sella (Steindachner, 1881) Fr native   4.00 cm SL male/unsexed   
Gobiidae Stiphodon atropurpureus (Herre, 1927) Fr native   5.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Gobiidae Stiphodon aureorostrum Chen & Tan, 2005 Fr endemic  scarce (very unlikely) 5.25 cm SL male/unsexed ;6.03 cm SL female  Type locality, lower reaches of Sungai Keliling, Juara, ZRC 46412 (holotype of Stiphofon aureorostrum, 5.2 cm SL, male). Known only from the freshwater streams of Pulau Tioman, Peninsular Malaysia. Found in the lower reaches of Sungai Keliling, Juara Bay, eastern Tioman; however an individual was observed by ISC in the lower reaches of Sungai Paya on the western side of the island. Apparently rare in the type locality, which seems to be predominated by Glossogobius celebius (Ref. 58086).  No picture yet.
Cyprinidae Striuntius lateristriga (Valenciennes, 1842) Fr native   18.60 cm TL male/unsexed  Most common primary freshwater fish in drainages of Pulau Tioman (Ref. 41184). Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 7020, 26580. 
Cyprinidae Striuntius lineatus (Duncker, 1904) Fr native   5.30 cm SL male/unsexed   
Sundadanionidae Sundadanio axelrodi (Brittan, 1976) Fr native   2.25 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Sundadanionidae Sundadanio margarition Conway, Kottelat & Tan, 2011 Fr native   1.97 cm SL male/unsexed  Known only from the peat swamp forests and blackwater streams from the Rajang and Sarawak River drainages and probably in between (Ref. 88800).  No picture yet.
Ehiravidae Sundasalanx microps Roberts, 1981 Fr native   2.30 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Nemacheilidae Sundoreonectes sabanus (Chin, 1990) Fr native    Type locality: Mountain rapids in Mendolong area, Sipitang Dist., Sabah, Borneo, East Malaysia, elev. 750 m. (Ref. 33021).  No picture yet.
Botiidae Syncrossus hymenophysa (Bleeker, 1852) Fr, Or native   21.00 cm SL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7020, 1632, 26580. 
Botiidae Syncrossus reversus (Roberts, 1989) Fr native   10.30 cm SL male/unsexed  Known from Borneo. 
Cyprinidae Systomus rubripinnis (Valenciennes, 1842) Fr native   25.00 cm SL male/unsexed  Occurs in Peninsular Malaysia (Ref. 4835). Also found in Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580, 36654. 
Gobiidae Taenioides gracilis (Valenciennes, 1837) Fr, Br native   30.00 cm TL male/unsexed   
Dorosomatidae Tenualosa macrura (Bleeker, 1852) Fr, Br, M native  Longtail shad (English), Terubuk laut (Malay), Herring (English), Shad (English), Small-mouth tenualosa (English), Bengkalis (Malay), Chee kark (Malay), Empirit (Malay), Ikan bengkalis (Malay), Temparik (Malay), Terubok (Malay), Terubok laut (Malay), Terubuk (Malay)  52.00 cm SL male/unsexed   
Dorosomatidae Tenualosa toli (Valenciennes, 1847) Fr, Br, M, Fi native  Toli shad (English), Terubuk sungai (Malay), Big-mouthed tenualosa (English), Chinese herring (English), Herring (English), Bekawal (Malay), Bengkalis (Malay), Chee kark (Malay), Temparik (Malay), Terubuk (Malay), Terubuk jantan (Malay), Terubuk mulut besar (Malay), Terubuk padi (Malay), Terubuk payau (Malay)  60.00 cm TL male/unsexed 29 FL Recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Considered to be the most commercially and culturally important estuarine fish in Sarawak (Ref. 57780). 
Terapontidae Terapon jarbua (Fabricius, 1775) Fr, Br, M native  Jarbua terapon (English), Kerong jalur (Malay), Crescent perch (English), Croaker (English), Grunter (English), Small-scaled terapon (English), Tiger perch (English), Bagat (Malay), Gelama (Malay), Gendang-gendang (Malay), Kelong-kelong (Malay), Kerong-kerong (Malay), Kirong-kirong (Malay), Mengkerong (Malay), Rumpak (Malay), San gaa (Malay)  36.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). Based on Photo by J.E. Randall. Sipadan Island (Ref. 28620). Remark: and Labroides bicolor. 
Cobitidae Theriodes sandakanensis (Inger & Chin, 1962) Fr native   4.40 cm TL male/unsexed  Known from Sabah, northern Borneo.  No picture yet.
Cyprinidae Thynnichthys thynnoides (Bleeker, 1852) Fr native   25.00 cm TL male/unsexed  Known from Perak and Pahang. 
Cyprinidae Tor douronensis (Valenciennes, 1842) Fr, Fi, Ft native  Pelian (Not specified), River carp (English), Belian (Malay), Kelah (Malay)  35.00 cm TL male/unsexed 40.2 TL Found in Crocker Range Park river system in Sabah (Ref. 56147). 
Cyprinidae Tor tambra (Valenciennes, 1842) Fr native   100.00 cm TL male/unsexed  Known from Danum valley and Kuamut headwaters. Juveniles are common in high velocity areas of small, rocky streams while larger individuals to 35 cm SL are found in the main channel of the Segama river (Ref. 34011). Also recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 26580. 
Cyprinidae Tor tambroides (Bleeker, 1854) Fr, Fi misidentification   100.00 cm SL male/unsexed 59.9 TL Known from Malay Peninsula and Borneo. Recorded from Danum valley Segama and Kuamut headwaters (Ref. 34011), Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). Also Ref. 4537, 26580, 27732. The species in Malaysia, previously classified as Tor tambroides refers to T. tambra (Ref. 114649). 
Toxotidae Toxotes chatareus (Hamilton, 1822) Fr native  Spotted archerfish (English), Sumpit tanda (Malay), Archerfish (English), Riflefish (English), Sumpit-sumpit (Malay)  40.00 cm SL male/unsexed  Recorded from the lower Segama (Ref. 34011). Also 36654. 
Toxotidae Toxotes jaculatrix (Pallas, 1767) Fr, Br native  Banded archerfish (English), Sumpit belang (Malay), Archerfish (English), Riflefish (English), Sumpit-sumpit (Malay)  30.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184) and Selangor, Peninsular Malaysia (Ref. 121464). Also Ref. 27550. 
Toxotidae Toxotes microlepis Günther, 1860 Fr, Br native  Smallscale archerfish (English), Sumpit tompok (Malay), Archerfish (English), Riflefish (English), Sumpit-sumpit (Malay)  15.00 cm SL male/unsexed   
Osphronemidae Trichopodus cantoris (Günther, 1861) Fr native      No picture yet.
Osphronemidae Trichopodus leerii (Bleeker, 1852) Fr native   12.00 cm TL male/unsexed  Also Ref. 1739. Endangered species (Ref. 4835). 
Osphronemidae Trichopodus pectoralis Regan, 1910 Fr, Fi, Aq introduced  Snakeskin gouramy (English), Sepat siam (Malay) abundant (always seen in some numbers) 25.00 cm TL male/unsexed  Known from the Rajang Basin in Sarawak, Borneo (Ref. 57780). Formed an important fishery in the country (Ref. 1739 and 6095). An important fish for the subsistence fisheries in the paddy growing areas (Ref. 84801). Genetic research (genetic relationship studies using electrophoretic markers) for the aquaculture sector is being done in the country (Ref. 55327). Introduced in the Krian rice-bowl area, northwestern Peninsular Malaysia. Has colonized swamps, canals and rice paddies where it yields 94-202 kg/ha but has been badly affected by double cropping of rice and wide use of pesticides. Has also displaced to some extent the native T. trichopterus (Ref. 6095). 
Osphronemidae Trichopodus trichopterus (Pallas, 1770) Fr, Thr native  Two-spot gouramy (English), Sepat padi (Malay), Sepat ronggeng (Malay)  15.00 cm SL male/unsexed  Recorded from the lower Segama (Ref. 34011), Pulau Tioman (Ref. 41184) and Rajang Basin in Sarawak, Borneo (Ref. 57780) and Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). May be endangered due to the introduction of Trichogaster pectoralis (Ref. 6095). Also Ref. 4789, 36654. 
Osphronemidae Trichopsis vittata (Cuvier, 1831) Fr native  Karim (Malay)  8.00 cm TL male/unsexed   
Danionidae Trigonopoma gracile (Kottelat, 1991) Fr native   5.50 cm SL male/unsexed  Listed among the rare or extinct species of peninsular Malaysia (Ref. 4835). Also Ref. 26580. 
Danionidae Trigonopoma pauciperforatum (Weber & de Beaufort, 1916) Fr native   7.00 cm TL male/unsexed  Found in Johore (Ref. 2091) and Rajang Basin in Sarawak, Borneo (Ref. 57780). Museum: Trengganu, Merchang, CAS-SU 47237 (Ref. 2091). 
Danionidae Trigonostigma heteromorpha (Duncker, 1904) Fr native   5.00 cm TL male/unsexed  Known from Perak, Selangor, Negri Sembilan, Johor and Pahang (Ref. 122370). Also Ref. 4537. 
Danionidae Trigonostigma truncata Tan, 2020 Fr native   2.51 cm SL male/unsexed  Known from Peninsular Malaysia, Terengganu. Syntopic species collected from Kuala Brang and Dungun swamp in Terengganu include the following: Barbodes cf. binotatus, Desmopuntius hexazona, Osteochilus vittatus, O. waandersii (Cyprinidae); Boraras maculatus, Rasbora bankanensis, R. cephalotaenia, R. usonensis, R. einthovenii, R. paucisqualis, Trigonopoma gracile, T. pauciperforatum (Danionidae); Acanthopsoides sp.,Lepidocephalichthys furcatus, Pangio cuneovirgata, P. piperata, P. semicincta, P. muraeniformis (Cobitidae); Homalopteroides nebulosus (Balitoridae); Nemacheilus selangoricus (Nemacheilidae); Barbucca diabolica (Barbuccidae); Hemibagrus capitulum, Nanobagrus fuscus, Pseudomystus stenomus (Bagridae); Silurichthys hasseltii (Siluridae); Parakysis verrucosus (Akysidae); Clarias leiacanthus (Clariidae); Neostethus smithi (Phallostethidae); Bihunichthys sp. (Chaudhuriidae); Hemirhamphodon pogonognathus (Zenarchopteridae); Xenentodon canciloides (Belonidae; Doryichthys martensii (Syngnathidae); Brachygobius xanthomelas (Gobiidae); Pristolepis grooti (Pristolepididae); Nandus nebulosus (Nandidae); Betta stigmosa, Luciocephalus pulcher, Parosphomenus paludicola (Osphronemidae) (Ref. 122370).  No picture yet.
Nemacheilidae Tuberoschistura baenzigeri (Kottelat, 1983) Fr native   4.20 cm SL male/unsexed  Occurs in Malay Peninsula (Ref. 26580). 
Soleidae Typhlachirus lipophthalmus (Károli, 1882) Fr, Br, M native   10.00 cm SL male/unsexed  Type locality of Synaptura lipophthalma, Sarawak, Borneo. Known from the lower reaches of Sungai Sadong of the Sadong River basin and Sungai Kuap of the Sarawak River basin (Ref. 126196).  No picture yet.
Dasyatidae Urogymnus polylepis (Bleeker, 1852) Fr native  Freshwater whipray (English), Pari dulang sungai (Malay), Giant freshwater stingray (English), Pari air tawar (Malay), Pari sungai (Malay)  240 cm WD male/unsexed  Recorded from Mukah, Sarawak, and in Sandakan, Sabah. First records are sightings from Kukup and Sungai Sembrong in Johor, Pulau Bruit in Sarawak, and Tanjung Batu Laut in Sabah (Ref. 127999). 
Vaillantellidae Vaillantella euepiptera (Vaillant, 1902) Fr native   12.00 cm SL male/unsexed  Known from Borneo. 
Vaillantellidae Vaillantella maassi Weber & de Beaufort, 1912 Fr native   12.50 cm SL male/unsexed  Occurs in Sumatra and Malay Peninsula Ref. 26580). 
Siluridae Wallago attu (Bloch & Schneider, 1801) Fr native  Tapah (Malay)  240 cm TL male/unsexed   
Siluridae Wallago leerii Bleeker, 1851 Fr native  Tapah (Malay)  150 cm TL male/unsexed  Known from Pahang, Terengganu and Selangor in Peninsular Malaysia (Ref. 12455). Also recorded from the Rajang Basin in Sarawak, Borneo (Ref. 57780). 
Siluridae Wallago maculatus Inger & Chin, 1959 Fr, Fi endemic   100.00 cm SL male/unsexed  Known only from Sabah, northern Borneo. Collected in the main Kinabatangan River as well as in small forest tributaries. Also recorded from Danum Valley and lower Segama (Ref. 34011). Also Ref. 13275. 
Belonidae Xenentodon cancila (Hamilton, 1822) Fr native   40.00 cm TL male/unsexed  Recorded from Gelami and Tinggi Rivers, Pahang River system (Ref. 97588). 
Apogonidae Yarica hyalosoma (Bleeker, 1852) Fr, Br native  Humpbacked cardinalfish (English), Sebekah bonggol (Malay), Cardinalfish (English), Sebekah (Malay), Semangka (Malay), Seriding (Malay), Serodong (Malay)  17.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Zenarchopteridae Zenarchopterus dispar (Valenciennes, 1847) Fr, Br native  Feathered river-garfish (English), Jolong kajangan (Malay), Jolong-jolong (Malay)  19.00 cm TL male/unsexed   
Zenarchopteridae Zenarchopterus ectuntio (Hamilton, 1822) Fr native  Halfbeak (English), Jolong sembir (Malay), Jolong-jolong (Malay), Nyulung (Malay)  18.00 cm TL male/unsexed  Also Ref. 4833. 
Zenarchopteridae Zenarchopterus gilli Smith, 1945 Fr, Br, M native  Viviparous halfbeak (English), Jolong beguk (Malay), Halfbeak (English), Jolong-jolong (Malay), Nyulung (Malay)  20.00 cm TL male/unsexed  Recorded from Pulau Tioman (Ref. 41184). 
Zenarchopteridae Zenarchopterus striga (Blyth, 1858) Fr, Br native    Type locality, Muar R., Selangor, Malay Peninsula (Ref. 26282). 
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