Jaguar, caiman, river dolphins, any larger carnivorous fish. They also are canibalistic, especially when in a frenzy. read more
Piranha Information, facts and fiction. Piranhas are one of the most efficient predators on earth, with razor sharp teeth and a ferocious nature. Piranha species, description, social behaviors, habitat, breeding and keeping the Piranha fish aquarium. read more
Piranhas' natural predators include crocodiles, Amazon river dolphins (botos), and herons. With the decline of these predators, piranha populations are increasing in certain rivers. Humans also hunt piranhas for their meat and for the pet trade. It is legal to have piranhas as pets in some areas. read more