Piranhas are fresh warm water fish whose range extends from the Orinoco River basin of Venezuela in the North, down to Paraná of Argentina in the South and includes the entire Amazon Basin.
A piranhas diet consists of insects, fish, crustaceans, worms, carrion, seeds and other plant material, but generally they will eat what they can get - some species are even vegetarian.
The Amazon waters are quite murky so fish tend to find their prey by smell or proximity. Often piranhas will wait in ambush and then dart out and take a nibble out of potential prey - sometimes even each other. However their reputation for being able to strip a large animal or even a human, down to the bone, is exaggerated. This “nipping” behaviour is quite common amongst fish of the Amazon.