A very big piranha
"This fish [Congo Tiger Fish] is only found in the central part of the Congo river system, which is a place where nobody really goes from the outside world, so most people don’t know about it. It’s related to piranhas — it’s a giant piranha, really; they can grow to the size of a large person. The teeth on this one are an inch long, which is about the same size as the teeth on a 1,000-pound great white shark."
