This is the large jaw of a Bull Shark, an aggressive, fast and agile preditor. It is considered the most dangerous of all the sharks and the one most likely to attack humans. Sharks have the most powerful jaws on the planet and unlike most animal jaws both the sharks upper and lower jaws move. Sharks can use up to 20,000 teeth in a lifetime and have ranks of backup teeth lined up and ready for use. This can be clearly seen in our specimen.