VAMPIRE FISH AKA THE THREE EYED FISH

In an effort to create more desirable and thus, more valuable goldfish, researchers at the Chan Koi Laboratories in China accidentally created the vampire fish also known as the three-eyed fang fish.
The vampire fish is a very aggressive fish always hungry for a new meal and although they only reach 9 inches in length, when in a school they are even more dangerous than the piranha.
In 2006 a mating couple of vampire fish managed to escape into the ocean and have been breeding since. Their numbers are estimated to be in the thousands and growing rapidly.
Up until 2008 there was only one documented case of a school of vampire fish attacking a human, but in 2008 there were six cases reported.