RED BELLY PIRANHA SKELETON Pygocentrus Nattereri is a species of piranha. This species lives in the Amazon River Basin, coastal rivers of north-eastern Brazil, and the basin of the Paraguay, Paraná and Essequibo Rivers. The red-bellied piranha has the reputation for being one of the most ferocious freshwater fish in the world. They have a set of razor sharp teeth which are capable of stripping flesh from prey and dead animals