There are a total of about 40 species Piranha, but not all are carnivorous as you might think, in fact many species feed on plants. None of the 40 species of large size can be considered, because it is small fish and only the larger species reach a maximum of half a meter. The body of these fish appears compressed on the sides. The flakes are generally small. The colors vary from species to species. Certainly the best known feature of these fish is the mouth, armed with a row of triangular teeth, like a bear trap. With a single bite can sever clearly a piece of meat the size of the opening of their mouth. This species generally lives in very many schools, including a few hundred copies. I can hear the water, even if present at very low concentrations, the presence of blood. They feed on any animal that falls into the water, especially if this turns out to be just hurt and loss of blood. Within seconds a group of these small fish reduces the bone. From the ecological point of view are very important because they play the role of scavengers of rivers, feeding on the remains of dead animals and rotting. In some cases, attacked the man and even more rarely encounter was fatal. In Brazil, in recent years, the number of people attacked by Piranha (Serrasalmus spilopleura ) increased. It seems that this event is due to rising temperatures, drought and the decrease of their normal prey. Present especially in the Amazon, are being bred in the aquarium for many aquarists adapting well to life in the tank.
In a photo Red-bellied Piranha (Pygocentrus nattereri).
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