Hypophthalmus fimbriatus

The Dolphin Catfish, (Hypophthalmus fimbriatus), is a species of demersal potamodromous catfish of the family Pimelodidae that is native to Santarém and the Negro River basin of Brazil and Venezuela.

Description
It grows to a length of 30.0 cm. Clearly distinguished by elongate, flat and thick mental barbels. Caudal fin deeply forked.

Ecology
It inhabits mostly blackwater rivers. It is largely zooplanktivorous specially cladocerans.