Piranha, also known as piranha, piranha, freshwater pomfret, etc. Is a fierce carnivorous fish in the tropical fresh water of Amazon. Their most intense features are social and oral structure. Piranhas have a well-developed upper jaw and their mouths are full of fangs, which makes their bite force small, but with sharp teeth, the threat is greater. It's easier to bite off flocks of meat from animals, and it's easier to bite cans, but such piranhas don't pose much threat to living animals.
Because they are still relatively small, people just stand there and let them eat, which can support them and cause some trauma at most. However, because they often appear in groups, once they smell blood, they will go out in groups and constantly bite their prey, eventually leading to the death of their prey due to excessive blood loss or severe pain, and finally being stripped naked by piranhas. But there are basically no humans in their diet, and more are other small fish and even insects. They bite large pieces of meat or live animals whenever they get a chance. There must be something to attract them.
That's the smell of blood. Some people think it's the noise caused by the disturbance of water. There are many people living in the Amazon river basin. Many people like to swim in the river, but not many people die because of piranha attacks, mainly because piranhas are small in size and have no ability to prey on large animals. Only when large animals shed a lot of blood in the water, attracting piranhas in the distance and forming a huge school of fish, can they kill people quickly and then have a full meal.
In some online videos, people fish in the Amazon River without even using a fishing rod. A group of rotten meat is tied with a rope, and piranhas will continue to bite and even be hung up with the meat. Moreover, in the case of piranha attacking people every year, there are not many deaths, because people are alive and thick, so they will not die so easily. When they are in pain, they will run away and will not wait there to watch themselves being eaten clean. This fierce animal is not without natural enemies. Giant bony tongue fish that also live in the Amazon River can eat them. Moreover, they are a delicious fish and are often caught by humans. Many factors can control their number, and they are not invincible.
Animals in nature are closely linked. Animals that can eat other animals will be eaten by other animals. The number of piranhas that can be fed in a water area depends on the organic matter produced by phytoplankton in the water, because all large animals are ready-made organic matter, and because the energy flow will form a food chain, animals are more or less natural enemies, or at least in their infancy, they may face the fate of being eaten at birth, and they can continue to reproduce and maintain the population until they die.