Author: (Gill, 1877)
Remark: See Rosen (1972) for relationships of species.
Comments: Inhabits rivers and streams of little to moderate velocity, occurring between 5 to 530 m elevation.  Predator in lakes and rivers.  Feeds principally on other fishes such as tetras, poeciliids and cichlids, but also consumes terrestrial and aquatic insects to a lesser degree (Ref. 36880).