Tor tambroides (Bleeker, 1854)
Thai mahseer
Tor tambroides
photo by Roberts, T.R.

Family:  Cyprinidae (Minnows or carps), subfamily: Torinae
Max. size:  100 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  Asia: Chao Phraya and Mekong basins, Malay Peninsula, Sumatra, Java, and Borneo (Ref. 27732). Reported from Myanmar (Ref. 7050), Salween and Maeklong rivers (Ref. 26336).
Diagnosis:  Dorsal spines (total): 4-4; Dorsal soft rays (total): 8-8; Anal spines: 3-3; Anal soft rays: 5-5; Vertebrae: 39-41. Has a long more or less square, median lobe on the lower lip reaching an imaginary line between the corners of the mouth (in specimens > about 7 cm SL); upper lip rolled backwards and upwards and with a median lobe projecting upwards; no dark longitudinal stripe along the side in adults; fins blackish in large adults, yellow in juveniles, and usually 4+1/2 scales between the lateral line and the dorsal-fin origin (Ref. 27732); has 9 branched dorsal-fin rays (Ref. 12693); eyes visible in ventral view; body deep and compressed; isthmus with small distinct scales, about 16 scales between isthmus and origin of pelvic fin; gill rakers 20; supero-posterior margin of dorsal fin deeply concave; pelvic fin tip pointed, posterior margin obviously concave; tip of anal fin pointed, extending to the base of caudal fin (Ref. 13848). Also Ref. 35913.
Biology:  Adults inhabit pools and runs over gravel and cobble in rivers flowing through undisturbed forests (Ref. 12693). Juveniles were most commonly collected in or near rapids (Ref. 27732). Found in small rivers and streams during the dry season. Move downstream at the onset of the rainy season, but generally avoid turbid waters. Mature individuals migrate upstream after two months and spawn in July near the mouths of small streams that the young subsequently ascend. Omnivorous, feeding on both animal and vegetable matter, at times consuming toxic fruits in flooded forests, making them temporarily inedible.
IUCN Red List Status: Data deficient (DD); Date assessed: 01 August 2018 Ref. (123251)
Threat to humans:  harmless
Country info:   

Entered by: Binohlan, Crispina B. - 11.08.94
Modified by: Luna, Susan M. - 19.01.21
Checked by: Casal, Christine Marie V. - 02.05.96

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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