Adult red-bellied piranhas reach a maximum length of 33cm / 13 in. They have powerful jaws and razor-sharp triangular, locking teeth. Adults have a red chin and belly and their sides are flecked with gold and silver.
Red-bellied piranhas are found throughout the Amazon basin and favor the smaller streams, tributaries, ox-bow lakes, and flooded forests of the Amazon watershed.
Despite their ferocious reputation, red-bellied piranha feed mostly on small fish, insects, worms, and crustaceans. They are known to feed on larger dead or dying animals but it is rare for them to attack a healthy animal. Some species of piranha actually feed on fruits and nuts! Approximately 20 species of piranha are found in the Amazon basin, many of which are eaten by the locals.