Which of the freshest fish is the most sophisticated ?

Piranha, which lives in the rivers of the tropical part of Central and South America, is the nicest of all freshwater fish. Although each fish has a length of only 30 cm, but flocks of hundreds of fish can kill and eat in a few seconds much larger than the animal itself. The weapons of the piranhas are extremely sharp teeth of a triangular shape, which they cut off the meat from the victim. But not all piranha killers. There are among them and those who eat only plants.

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