Facts about Cookiecutter Shark
The largetooth cookiecutter shark, Isistius plutodus, is a sleeper shark of the family Dalatiidae. They live at depths of between 880 and 6,440 m. Its length is up to 42 cm. The largetooth cookiecutter sharks are found in the western Atlantic Ocean off Alabama and the Gulf of Mexico including Brazil, and the northwest Pacific Ocean off Okinawa. The largetooth cookiecutter shark has an extremely short snout, and anteriorly positioned eyes which allows for binocular vision. It has no collar marking around the throat, a small asymmetrical caudal fin with a short ventral lobe less than half the length of the dorsal caudal margin It has a large oily liver which helps it to become neutrally buoyant. The shark has bigger mouth and gigantic lower teeth (proportionately the largest in any living shark) in 19 rows (upper teeth = 29 rows). Its powerful jaws, big mouth and enormous lower teeth enable it to bite off large portion of its prey in one sweeping motion. |
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