..... Piranhas can be found only in the Amazon river of South
America, because of their notorious reputation, they are considered
as an exotic pet to keep. They had been poached from their natural
habitat that it is almost depleted in large number. The national
geographic channel you watched might be a few years back. The
present population of piranhas in the wild are decreasing fast.
That's why the WWF classified them as "Endangered Species"
