Labiobarbus siamensis (Sauvage, 1881)
Archkok,  Trey ach kok
Labiobarbus siamensis
photo by FAO

Family:  Cyprinidae (Minnows or carps), subfamily: Labeoninae
Max. size:  22 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  Asia: Chao Phraya, Bankpakong and Mekong basins.
Diagnosis:  Dorsal soft rays (total): 30-30. Presence of dark mark above pectoral fin forming a well defined ring (often absent); 25-30 branched dorsal rays; caudal and dorsal dusky, without well-defined color pattern (Ref. 43281).
Biology:  Occur in midwater to bottom levels of rivers and streams. Migrates out into flooded forests during high water periods where it feeds on phytoplankton, periphyton, benthic algae and some zooplankton. Used to make prahoc (Ref. 12693).
IUCN Red List Status: Least Concern (LC); Date assessed: 19 February 2011 Ref. (130435)
Threat to humans:  harmless
Country info:  Known from the Mekong basin (Ref. 7424). Found around the Tonle Sap river and Great Lake (Ref. 36651). Occurs at midwater to bottom of streams (Ref. 36686). Also Ref. 36662, 33813, 43281.


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