Great white shark
The great white shark is one of nature’s most deadly carnivores, and is distinguishable by its jaws and many sharp teeth.  The difference is the ability for both the shark’s jaws to move when ambushing its prey.  It will first bite with the lower jaw to sink its teeth in, then closes the upper jaw and begins thrashing its head repeatedly to tear off chunks of flesh . Its mouth may contain as many as 3, 000 teeth at one time, sitting in five rows with the largest set in the front.  In the event a tooth is lost, another comes forward from a stash of backup teeth embedded in the shark’s jaws.