Pygocentrus
Pygocentrus is a genus of freshwater ray-finned fishes belonging to the family Serrasalmidae, which includes the pacus, piranhas and related fishes. All species are native to tropical and subtropical South America. All the species are predatory, scavengers and may form large schools. The famous red-bellied piranha, Pygocentrus nattereri, is one of four species in the genus.
Species
These are the currently recognized species in this genus:Pygocentrus cariba Pygocentrus nattereri Kner, 1858 Pygocentrus pirayaPygocentrus palometa Valenciennes, 1850 is regarded as a nomen dubium.