Scientists believe their teeth—which are not used in feeding ... as large as a full-grown whitetip reef shark. During the 20th century, basking sharks were widely fished for their liver ...

NOVA: Do sharks make sounds? Gruber: They make hydrodynamic sounds when swerving and accelerating, and they make crunching sounds with their teeth and jaws. But they don't have special organs for ...

A specialist in capturing reef fish in coral caves and crevices. By day these placid sharks are often found in numbers lying motionless on the reef and are common sites to divers. Harassed by ...