The Cookiecutter sharks are unique because they feed on everything from the biggest, toughest apex predators — like white sharks and orcas — down to the smallest creatures in the ocean. Cookiecutter ...

Never judge a book by its cover nor a shark by its name, because what the cookiecutter shark is capable of is absolutely horrifying.

Cookiecutter sharks (Isistius brasiliensis) grow as large as 20 inches long. Because they’re small and live in deep waters, they don’t receive much attention or academic study.

Cookiecutter sharks have only been involved in four confirmed, unprovoked bites, which all happened in Hawaii, it said, citing the International Shark Attack File.

The Cookiecutter sharks have generally only been observed near surface waters during the night, leading researchers to believe that they exhibit vertical migration, ...

Cookiecutter sharks generally live the oceanic ‘twilight zone’ in depths to 3,300 feet (1,000 meters) and eat fish, squid, and crustaceans. They usually only surface from the deep at night, ...

Cookiecutter sharks rip small, cookie-shaped chunks out of sharks and whales, but a new study finds big animals make up only a small part of their diet. Skip to main content.

Cookiecutter sharks leave a very distinctive scar when they bite; their specialized jaw allows them to "scoop out a hemispherical plug of flesh from their prey," according to the study.

Shark attacks are a rarity, despite sharks' fearsome reputation. A 2009 attack on a swimmer in Hawaii by a small cookiecutter shark is the first documented by that species.