The Serrasalmidae family includes some 16 genera and 98 species. These species are classified in a number of groups including: Pacus, Piranhas and Silver Dollar.
Genera within the Serrasalmidae family and divided into groups:
The classification of this family poses some problems. The species look similar and in the past descriptions have been based on external characteristics. Many Serrasalmidae look very similar, which makes correct identification difficult.