arimã

The term 'small-toothed piranha' is a descriptive English name for fish of the genus *Serrasalmus*, particularly species like *Serrasalmus rhombeus*. These fish are native to South American freshwater systems. While they belong to the piranha family (Serrasalmidae), they are often smaller and less aggressive than the more infamous red-bellied piranha (*Pygocentrus nattereri*). Their diet includes fish, insects, and crustaceans. In Brazil, the specific name 'arimã' is used for *Serrasalmus rhombeus*.