The upper jaw of piranha is developed and full of teeth, which makes them bite. Although it is not very big, it is more threatening with sharp teeth, and it is easier to tear off a mass of meat from small animals and bite coke bottles. However, a piranha will not pose much threat to living small animals. Because of their small size, people are standing. At most, it will cause some trauma to people, but because it often happens in groups, once you smell the fishy smell, you will go out in groups and tear your prey. Finally, the hunter will faint and die because of excessive blood loss or intense pain, and finally the piranha will swallow all the meat.
I don't know that most of their recipes are empty, and a large number of them are other small and medium-sized fish species and even insects. They tear small pieces of meat or living animals whenever they get a chance, so what elements will definitely attract them back. That's foul smell, and some people think it's noise caused by water quality oscillation.
There are many people in the daily life of the Amazon River. Many people like to swim in the river, but not many people are killed by piranhas. The key is that piranhas are small and have no ability to feed large animals. Only when large animals shed a lot of blood in the water, attracting piranhas in the distance and forming huge fish, can people die quickly and become crazy. In some online videos, when people fish in the Amazon River and don't even need a fishing rod, they tie a group of carrion with a rope, and piranhas will be torn or even lifted by others. And not many people die every year when piranhas attack people. Because people are alive and fleshy, it is not easy to die casually, and they will run away if they hurt. It's not easy to wait there and watch yourself being eaten clean.
This fierce animal is not without nemesis. Just like the giant bone tongue fish that lives in the Amazon River every day, it can be used as food, and it is a delicious fish species that is often caught by people. A variety of factors lead to their total number can be manipulated, rather than super-existence.
Small animals in nature are interrelated. If they can eat other small animals, they will be swallowed up by other small animals. The total number of piranha that can be planted alive in a sea area depends on the organic compounds produced by phytoplankton in the water. Because all kinetic energy of large animals comes from existing organic compounds, and because the mobility of kinetic energy will create a food web ecosystem, small animals are more or less nemesis, or at least in childhood, and they are likely to be killed at birth.