Great hammerhead shark
The cephalofoil of the great hammerhead shark is said to be used to pin stingrays down, because agreat hammerhead shark was found attacking a stingray in the Bahamas; the great hammerhead first pinned the stingray down by hitting the stingray with its cephalofoil, and then it grabbed the stingray in its jaws and started to rip apart the stingray by shaking its head rapidly.