Why do hammerhead sharks have broad heads?
Scientists think that having their nostrils separated helps hammerheads to better follow the direction of a scent trail. A hammerhead can detect a slight change in the concentration of a scent between the two nostrils, which helps them map any changes in direction of their prey. And their eyes sit out on the ends of their head, giving them extremely good binocular vision. In addition, most sharks use the underside of the head, as well as the pectoral fins, to help them “fly” through the water. It’s possible that the broadened head also provides additional lift.
