Goliath Tigerfish

Grows like goliath, hunts like a tiger and swims like a fish. The Goliath Tigerfish lurks the waters of the Congo River system and several other lakes in southern Africa.

This fish is remarkably adept at swimming and killing due in part to an air-filled sac in its body that allows it to detect vibrations from animals in the water. Those razorsharp spikes in its mouth may also help the cause.