Piranha

A piranha is a type of flesh-eating fish that lurks in the murky waters of Rayman's world. In the original Rayman, they are found only in Dream Forest, and fly up from the water. If Rayman touches them he loses a hit point, and if he's unlucky, he could be pushed into the water and lose a life. In Rayman 2, they are found in any body of water that Rayman cannot swim in, usually polluted or stagnated water, or even acid. They are also present in Rayman 3, mainly in the Bog of Murk, but while Rayman can actually swim in the dirty waters they live in, they will deplete his energy very quickly and cause a game over.

Rayman can defend himself from piranha by punching or shooting them, which shatters their sharp teeth and then defeats them.