Piranhas

In the rivers of South America inhabited by small but very predatory fish - Piranha. Adult piranha olive-silvery with purple or red hue. At the edge of the caudal fin extends a clear black border. Young piranhas have silver coloring, sides with black spots, anal fins are reddish or yellowish. Piranhas barely reach 30 cm in length, but for the animals and the people who cross the river, they are very dangerous. Attacking thousandths flocks, piranhas inflict terrible bites. And before the animal's body falls to the bottom, with their strong jaws piranhas gnaw it to the bone. In the rivers, where there are piranhas, they are almost completely destroy all fish. Crocodiles escape from the piranha, swimming out to the surface and give predatory fish their back, covered with strong armor.

Young piranhas have silver coloring, sides with black spots, anal fins are reddish or yellowish

Piranha have a triangular 4.5 mm teeth and they are located so that the teeth of the upper jaw includes exactly into the grooves between the teeth of the mandible. Jaws act in two ways: at the closing of the jaws the meat is cut with a razor sharp teeth, when the displacement of closed jaws horizontally fish can bite off more dense tissue - veins and even bone. Adults piranha can bite stick or a human finger.

Piranhas are able to emit different sounds. So, being extracted from the water, they begin to "bark", by fighting for the food they produce a low, similar to the drum sound. In other cases, such as when one fish swim too close to another, they can caw.

In the rivers, where there are piranhas, land animals and people not only can not swim, but even a drink of water. Many local residents and animals have the bite marks of predatory fish.

In recent years in Brazil invented a tool that allows people to not be afraid of piranhas. Made powder, which in just 15 minutes, not only kills adult piranhas, but also their larvae. Another fish and animals he does not harm.

Tools