The natural enemies of piranhas are electric eels, South American giant otters, spiny catfish, caimans, and egrets.

1, electric eel

Piranha's natural enemies have electric eel, electric eel is a common fish in the Amazon basin, it is a kind of large fish, can be in a short period of time to release the ability of strong voltage, even crocodiles do not dare to provoke it. When the electric eel encounters swarms of piranhas, the electric eel will discharge to fend them off, the electric eel can instantly release thousands of Ford's voltage, once it discharges, the entire 6-meter range all become high-voltage electricity area.

2, South American giant otter

South American giant otter is also known as the big otter, it is the largest of the existing 13 species of otters in one of the largest, the adult South American giant otter's body length of about 1.6 meters, weighing 30 kilograms of life in the water in the next mammal, but also the South American giant otter has sharp teeth and claws, they hunt! They are also known to have sharp teeth and claws and can hunt piranhas that are only 20 centimeters long.

3, spiny catfish

Spiny catfish is known as the "Amazon killer", they have a very strong killing power, mainly in South America, Peru, Brazil, Colombia and other places, spiny catfish is good at their own sharp thorns, once the piranhas are staring at, will be the fastest speed to swim to the piranhas. The fastest speed to swim to the piranha's abdomen, if the piranha want to its mouth, spiny catfish will immediately spines angry, so that the piranha can do nothing.

4, caiman

Caiman crocodile is also the natural enemy of the piranha, it is the smallest crocodile in the volume of a kind of average body length of 1.2-1.8 meters, the overall look of a more proportional, wider abdomen, the body color of the brown or black, the body is sometimes long with a light spot, they are very large mouth, long full of sharp teeth, the bite force is amazing! that can eat piranhas in an instant.

5, egrets

Egrets are larger, and feathers are white, legs and mouth for the black, toes for the yellow, they like to perch on the coast, bays, estuaries, often appear in groups, mainly to a variety of small fish for food, and piranhas are also their meals, because piranhas do not have people imagine the The piranhas are not as "demonized" as people think.