Identification: Another commonly used name is Serrasalmus nattereri. Some United States specimens misidentified as members of this species may actually have been closely related species, the Orinoco piranha (Pygocentrus notatus, whose other names include P. caribe and Serrasalmus notatus). Pacus (Colossoma and Piaractus) also have been frequently misidentified as piranhas. Fink (1993) recently reviewed the genus Pygocentrus and provided a key and photographs.
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