The Red Bellied Piranha is without a doubt one of the most vicious fish in existence. What they lack in size they make up in numbers and ferocity. They are equipped with rows of razor sharp teeth that cut into their prey like a shark. They are also opportunists, so when this poor Egret chick falls into the water this school of Piranha attacks instantly. Within moments the water is stained red and the Egret is gone, nature is one powerful beast.