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 tradePiranha have pointed, razorsharp teeth in a pronounced underbite, whereas pacu have squarer, straighter teeth and aPiranha Fish Diet Piranhas are opportunistic carnivores (flesheaters) They eat aquatic and land animals that are in the water Some of their prey includes fish, mollusks, crustaceans, insects, birds, lizards, amphibians, rodents and carrion (carcasses)
Killer Piranhas Myth Or Fact Explorersweb