Mystacoleucus marginatus (Valenciennes, 1842)
photo by CAFS

Family:  Cyprinidae (Minnows or carps), subfamily: Cyprininae
Max. size:  20 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  Asia: Mekong, Chao Phraya and Meklong basins; also from the Malay Peninsula, Borneo, Sumatra and Java. Recorded from Myanmar (Ref. 4832).
Diagnosis:  Anal fin with a convex distal margin; dorsal fin with black anterior and distal margins; a black distal margin on the caudal fin; most scales with a black crescent-shaped mark on their base (Ref. 27732).
Biology:  Found at bottom depths of rivers and streams. Inhabits areas with sand or pea-gravel from small streams to large rivers (Ref. 12693). Usually found in streams with clear and moving waters (Ref. 27732). Breeds when water levels begin to rise, but whether it leaves permanent water or not is unknown. Occasionally seen in markets (Ref. 12693).
IUCN Red List Status: Least Concern (LC); Date assessed: 28 March 2011 Ref. (130435)
Threat to humans:  harmless


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