We stopped at the fish store for some water for our fish tank. We were in for quite an experience. We got to see how piranhas eat. It was awful...it was fast...it was educational. Big sister and I read about the piranha's eating frenzy from a library book. Seeing is believing right? Well, it is as bad as it sounds. A piranha basically ate the whole goldfish in one bite. All that was left were a few shiny scales. Want to know how the fish store owner knows they are hungry? When they realize they are eating each other! I guess they take little nibbles from their friends!