The Goliath's teeth are set at the edge of the jaw -- the monster has barely any lips.

The Goliath tigerfish has an olive-colored back and a silvery underbelly. Goliath tigerfish are a rather scary-looking fish that prowl the waters of the Congo River in Africa.

They are members of the family Hydrocynus, which includes four other species of tigerfish.

And when those teeth slam down on prey, it's a clean, almost surgical cut. While all five species of tigerfish have toothy jaws and a fearsome appetite (with some tigerfish known to capture birds in flight), the goliath tigerfish is the largest of them all. Each tooth can be up to one inch long. But if you see one, what you'll remember is its mouthful of 32 jagged, razorlike teeth.