Cookiecutter shark

Cookiecutter Shark (Isistius brasiliensis), also known as the cigar shark, is a small species of shark belonging to the family Dalatiidae. This shark is notable for its unique feeding mechanism, which involves making a circular cut, as if taken out by a cookie cutter, on its prey. The Cookiecutter Shark inhabits warm, oceanic waters worldwide and is often found near islands.

Description

The Cookiecutter Shark is relatively small, typically reaching lengths of about 42 to 56 cm (17 to 22 in). It has a long, cylindrical body with a short, blunt snout. The skin is brownish in color, with a lighter underbelly. One of its most distinctive features is its large, suctorial lips and a set of closely spaced, serrated teeth that are ideal for its unique feeding strategy.

Distribution and Habitat

Cookiecutter Sharks are found in warm, oceanic waters around the world. They are primarily pelagic, living in the open ocean, but can also be found near islands. Their distribution ranges from the Atlantic Ocean, including the Gulf of Mexico and the Caribbean, to the Pacific and Indian Oceans.

Behavior and Ecology

Feeding

The Cookiecutter Shark's feeding behavior is particularly notable. It attaches itself to larger marine animals, including whales, dolphins, and large fish, and uses its sharp teeth to remove a plug of flesh, leaving a circular wound. This parasitic behavior does not typically kill the host but can cause significant injury.

Reproduction

Little is known about the reproduction of Cookiecutter Sharks. They are believed to be ovoviviparous, with females giving birth to fully formed pups.

Conservation Status

The International Union for Conservation of Nature (IUCN) has not assessed the Cookiecutter Shark's conservation status due to insufficient data. However, they are not currently considered to be at risk due to their wide distribution and deep-water habitat, which limits their interaction with human activities.

In Popular Culture

The unique feeding marks left by Cookiecutter Sharks have been noted in various marine animals and have occasionally been mistaken for UFO-related phenomena or mysterious sea monsters.

See Also

• Shark
• Marine biology
• Ovoviviparity

References

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  Cookiecutter shark

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  Close-up of Cookiecutter shark head

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  Belly of Cookiecutter shark

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  Damage caused by Cookiecutter shark

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  Scars from Cookiecutter shark bites on Gray's beaked whale

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  Cookiecutter shark