1. piranha is a general term for a class of fish in the Amazon River in South America, which is also translated as piranha. Not a certain fish, but a group, including nearly 30 species.

2. According to different eating habits and living habits, it can be divided into two types: phytophagy and carnivorous. The piranha usually refers to the red-bellied saw carp (nattereri) that eats meat.

This fish is 30 cm long. It is mainly distributed in rivers from the east to the Brazilian plain in the Andes. Besides Amazon River, Cuyaba River and Orinoco River are also its main producing areas. Different river sections have slightly different colors. 10- 15 cm healthy individuals, the back is blue-gray to brown-gray, and the abdomen is light red to blood red.

In daily life, cannibals are usually compared to cruel and inhuman people. Cannibals are so vicious that even people can eat them. It is best to compare those who are unreasonable.