The animal with the sharpest teeth is piranha. Mature piranhas have similar male and female appearance, bright green back, bright red abdomen and stripes on both sides of their bodies. Have a highly developed hearing. The jaw is short and powerful, the jaw is prominent, and the teeth are triangular and sharp, staggered up and down. After biting the prey, bite it tightly and tear off the meat with the twisting of the body. You can bite 16 cubic centimeter of meat in one bite.

The rotation of teeth enables them to eat continuously, and a strong dentition can lead to serious bites. Piranha is one of the most notorious animals because of its sharp teeth and attacking large animals in groups. During my stay in Brazil, someone witnessed the terrible sight of a group of piranhas tearing a cow to pieces in just a few seconds, although the authenticity was not high enough.

Extended data:

Piranhas inhabit the main stream and larger tributaries, where the river is wide and the water is urgent. Adult fish mainly feed at dawn and dusk, mainly insects, worms, small fish and carrion, but some of them only eat plants and small fish. The activities are mainly during the day, and will rest in a sheltered place at noon.

"Piranha" is not strict with water quality, and likes weak acidic soft water. The water temperature suitable for growth is 22 to 28 degrees Celsius. Most of these fish feed in groups, and the staple food is relatively small fish. They hunt anything that moves in the water, especially something sensitive to the smell of blood. Any smell of blood will arouse a large group of "piranhas" to attack fiercely.

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