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Are piranhas dangerous for humans?

We know from films and art books that we should put our hand into the water where piranhas live and they absorb it in a minute. Well, maybe it’s not exactly, but if there’s a wound on the body and blood gets into the water, then the piranhas feel it for a kilometer and will attack the person with the whole pack and surely there will be only one skeleton left from him. 

Is this really so?

First you need to understand whether the piranha is really an extremely aggressive creature that attacks water on everything that moves. Perhaps, this will sound unexpectedly, but piranha is a very careful fish, and it does not pose any danger to a person. There is a large amount of evidence when a person swims in piranha-infested water without any harm to their health.

This was fully demonstrated by Herbert Axeldorf, a famous biologist specializing in the study of tropical fish. To prove the safety of the piranhas for a man, Herbert filled a small pool with piranhas and dived into it, leaving only muffins on. After swimming some time among the predatory fish and not having received any harm to their health, Herbert took fresh blood-soaked meat in his hand and continued to swim with him. But a few dozen piranhas in the pool did not come nearer to the man anyway, although most recently they ate the same meat with pleasure when there was no one in the pool. 

Piranhas, considered terrible predators with an inordinate thirst for fresh flesh, are actually rather timid fish and FALCONS not daring to approach larger creatures.

It is known that piranhas prefer to stay in large flocks, and if one saw a piranha in the water, others are nearby. But this is done by piranhas not because a pack of predatory fish is easier to fill up and kill a person entering a water, but because piranhas themselves are a link in the food chain for other larger fish species. Being in a pack of dozens of individuals, the chance that they will eat you is quite low. 

Moreover, experiments with piranhas showed that, being alone, these fish do not feel as peaceful as if they were surrounded by other fish.

But, despite its peace-loving behavior towards a person, piranhas are real killing machines for other kinds of fish that stand below them in the food chain. Their powerful jaws are designed to bite and tear, and dense muscular bodies are able to perform incredibly fast movements and jerks under the water. It is believed that the force of compression of the jaw muscles relative to body size in piranhas is the highest in comparison with any other vertebrate in the world. For example, piranha ordinary can easily bite off an adult’s finger.

But in history, there was not a single reliable case of piranha attack on a person with a fatal outcome. But this does not mean that these fish never bite a person or an animal that has entered the water. And this behavior is almost always due to non-aggressive behavior of fish, and self-defense or abnormal weather conditions, because of which the behavior of piranhas begins to differ sharply from the usual. Under abnormal weather conditions is meant a period of drought, when the rivers in which piranhas dwell dry up, and in the depressions filled with water, but cut off from the main channel, there are many fish that are deprived of food. Starving predators gradually begin to eat themselves and may well rush to any creature that has come close to the water. Sometimes the propensity of piranhas to aggressive behavior is fixed during spawning, When they rush to a person or animal as self-defense, but such cases are extremely rare. And certainly there is no question of a collective attack of piranha on a man.

Surprisingly, piranhas, being in the opinion of many of the most dangerous predators, are also extremely timid at the same time! Aquarium, which will live piranhas, it is desirable to keep away from sources of noise and shadows, otherwise your pets will always be on the verge of fainting! Well-known among aquarists is the fact that it is enough to click on the glass or sharp movement around the aquarium, so that the piranhas faint. They also often faint during transportation from the place of purchase to the future home.

But all of the above does not mean at all that piranhas will refuse to eat human meat. Unfortunately, sometimes tragic events occur on the water – people or animals are drowning. Already the lifeless body floating in the water lures to itself a lot of fish, including piranhas, which leave on it specific bites. The people who saw it think that the cause of death was the attack of piranhas – and most myths about the attack of flocks of piranhas on people or animals are born.

And here Paku is the general name of several species of omnivorous South American freshwater piranhas. Paku and common piranhas (Pygocentrus) have the same number of teeth, although there are differences in their alignment; the piranha teeth are pointed, razor-shaped with a pronounced mesial bite (the lower jaw protrudes forward), while the square has straight square teeth with a slight mesial or even distal occlusion (the upper front teeth are advanced in relation to the lower ones). In the adult state, wild individuals weigh more than 30 kg, they are much larger than piranhas. 

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