I went fishing in the Amazon basin once. Had a great time. We caught and ate piranha. There were 3 types, Black, White, and Red. The black and white were good eating... The reds were not edible as they generally were whites that had been infected with a parasite. As I remember it, we brought home some Piranha jaws. I didn't see them when we moved my father's stuff... I guess they were eaten (to get the jaw, you tied the fish head to an ant hill and let the ants do the cleaning for you).