Bull Shark

Behavior
Bull sharks are typically solitary hunters, but occasionally hunt in pairs. They often cruise through shallow waters. They can accelerate rapidly and can be highly aggressive, even possibly attacking a racehorse in the Brisbane River in the Australian state of Queensland. They are extremely territorial and attack animals that enter their territory. Since bull sharks often dwell in very shallow waters, they may be more dangerous to humans than any other species of shark, and along with the tiger shark and great white shark, are among the three shark species most likely to attack humans.
One or several bull sharks may have been responsible for the Jersey Shore shark attacks of 1916, which was the inspiration for Peter Benchley's novel Jaws. The speculation of bull sharks possibly being responsible is based on some attacks occurring in brackish and freshwater, as well as there being certain similarities in bite marks between bull and great white sharks.