Acestrorhynchus falcirostris (Cuvier, 1819)
Acestrorhynchus falcirostris
photo by IBAMA

Family:  Acestrorhynchidae (Smallscale pike characins), subfamily: Acestrorhynchinae
Max. size:  45 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater; pH range: 5.19999980926514 - 7.19999980926514; dH range: 5 - 18
Distribution:  South America: Amazon and Orinoco River basins and rivers of Guyana.
Diagnosis:  Presence of black fringe on the posterior edge of the operculum, especially on the dorsal half, that creates the appearance of a dark "collar"; scales on lateral line 140-175; and presence of single branched lateral line canals (Ref. 52916).
Biology:  Found in clear and black waters (Ref. 52916). Voracious predator.
IUCN Red List Status: Least Concern (LC); Date assessed: 13 February 2020 Ref. (130435)
Threat to humans:  harmless


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