https://en.wikipedia.org/wiki/Cookiecutter_shark
The cookiecutter shark (Isistius brasiliensis), also called the cigar shark, is a species of small squaliform shark in the family Dalatiidae.This shark occurs in warm, oceanic waters worldwide, particularly near islands, and has been recorded as deep as 3.7 km (2.3 mi). It migrates vertically up to 3 km (1.9 mi) every day, approaching the surface at dusk and descending with the dawn.

https://www.britannica.com/animal/cookiecutter-shark
Learn about the two species of cookiecutter sharks, their distinctive features, feeding habits, and distribution. Find out how they use their large teeth to cut out flesh from larger animals and why they rarely harm humans.

https://oceana.org/marine-life/cookiecutter-shark/
Learn about the cookiecutter shark, a small shark that bites chunks of flesh from larger animals in the open ocean. Find out how it feeds, where it lives, and why it is not a threat to humans.

https://www.sharksider.com/cookiecutter-shark/
Learn about the Cookiecutter Shark, a small deep-water shark that bites chunks of flesh from larger prey. Find out how it glows, how it breeds, and why it is not dangerous to humans.

https://www.youtube.com/watch?v=aQNixrJUk_o
Learn about the cookiecutter shark, a rare and mysterious shark that lives in the Bermuda Triangle. Watch a video from National Geographic that explores its features, behavior, and habitat.

https://www.sharks.org/cookiecutter-shark-isistius-brasiliensis
Cookiecutter sharks are poor swimmers, and generally only caught at night. They probably migrate vertically from deep water [2000-3000 m] to midwater or surface at night. They are an ectoparasite on large fish and cetaceans, which are possibly lured to the shark by its bioluminescent light organs. Its thick lips and modified pharynx are used to

https://ocean.si.edu/ocean-life/sharks-rays/cookie-cutter-shark
Learn about the cookie-cutter shark, a shark that feeds by taking round bites out of larger animals. See pictures of the shark and its victims, such as elephant seals and whales.

https://www.sharktruth.com/cookiecutter-shark/
Learn about the Cookiecutter Shark, a small deep-sea shark that leaves circular wounds on its prey. Discover its scientific classification, physical characteristics, distribution, diet, reproduction, conservation, and more.

https://ocean.si.edu/ocean-life/sharks-rays/cookie-cutter
Learn about the cookie-cutter shark, a small but fierce predator that leaves circular scars on its prey. See photos and facts about this unique shark species and its bite mark.

https://animalia.bio/index.php/cookiecutter-shark
Learn about the cookiecutter shark, a small squaliform shark that bites round chunks of tissue from marine mammals and large fish. Find out its distribution, appearance, lifestyle, diet, population status and relationship with humans.

https://oceanhero.today/marine-life/animals/cookie-cutter-shark
4. The cookiecutter shark sheds entire rows of teeth at once. Since the teeth are all fused together, cookie cutter sharks don't lose one tooth at a time. Instead, they regularly shed entire rows of teeth at a time. By the time a cookiecutter shark is 50cm (20in), it will have shed 15 sets of lower teeth.

https://sharkstewards.org/open-water-swimmers-nightmare-the-cookiecutter-shark/
Learn about the cookiecutter shark, a small dogfish that attaches itself to larger hosts and bites out a plug of flesh. Discover its unique anatomy, behavior, distribution, and how it uses bioluminescence to trick predators.

https://www.thoughtco.com/cookie-cutter-shark-facts-2291429
Learn about the small shark species that can produce a greenish glow and leave round wounds on its prey. Find out its classification, description, habitat, feeding habits, reproduction, and conservation status.

https://www.floridamuseum.ufl.edu/discover-fish/species-profiles/isistius-brasiliensis/
Learn about the cookiecutter shark, a small, cigar-shaped shark that feeds on larger animals by cutting out a circular chunk of flesh. Find out its common names, distribution, habitat, biology, and conservation status.

https://phys.org/news/2021-08-cookiecutter-sharks.html
Learn how researchers used various techniques to uncover the feeding habits and habitats of Cookiecutter sharks, a small, under-studied shark that feeds on anything from whales to crustaceans. Find out how they differ from other sharks and why they are important for the deep sea ecosystem.

https://a-z-animals.com/animals/cookiecutter-shark/
Learn about the cookiecutter shark, a small squaliform shark that leaves a cookie-shaped bite hole in its prey. Find out its scientific name, classification, distribution, diet, predators, and more.

https://www.marinebio.org/species/cookiecutter-sharks/isistius-brasiliensis/
Cookiecutter sharks, Isistius brasiliensis (Quoy and Gaimard, 1824), aka cookie-cutter shark, smalltooth cookiecutter shark or cigar shark, are small, deepwater sharks named for the cookie-shaped wounds they leave on larger fish and marine mammals.

https://www.sciencedaily.com/releases/2021/08/210823125805.htm
Researchers from University of Delaware and Monterey Bay Aquarium used biochemical techniques to reveal the feeding habits and habitats of the elusive Cookiecutter shark. They found that the sharks mostly feed on crustaceans, squid and small fish in their deep-sea environment, and may not exhibit vertical migration.

https://sharksinfo.com/cookiecutter-shark-facts/
The Cookiecutter's big eyes allow it to visually lock onto its victim long before it physically does. Unlike other sharks, the Cookiecutter Shark's retina includes ganglion cells in a circular area (rather than the conventional horizontal streak), which may explain why it has remarkable binocular focus. Fact # 8:

https://facts.net/nature/animals/20-best-cookiecutter-shark-facts/
01 The cookiecutter shark is only about 16-22 inches long, making it one of the smaller shark species. 02 It has a cigar-shaped body, which is why it's also called the cigar shark. 03 This shark is found in warm oceanic waters around the world, usually at depths of 1,000 to 2,000 meters. 04 The cookiecutter shark has a unique feeding method

https://en.wikipedia.org/wiki/Largetooth_cookiecutter_shark
The largetooth cookiecutter shark (Isistius plutodus) is a rare species of squaliform shark in the family Dalatiidae, reported from depths of 60-200 m (200-660 ft) at scattered locations in the Atlantic and Pacific Oceans.As its common name suggests, it is similar in appearance to the cookiecutter shark (I. brasiliensis) but has much larger lower teeth.

https://australian.museum/learn/animals/fishes/smalltooth-cookiecutter-shark-isistius-brasiliensis/
The Cookiecutter Shark is named after the cookie-shaped wounds that it leaves on the bodies of its prey. This image shows wounds on the side of a Yellowfin Tuna. A Yellowfin Tuna purchased from Sydney Fish Market by Dr Kevin Rowling, 20 June 2010 (AMS I.45217-001) Image: M. Eusebio, Mark McGrouther

https://www.nationalgeographic.com/science/article/what-bit-this-great-white-shark-a-cookie-cutter
Learn how the cookie-cutter shark uses its saw-like lower jaw to scoop out chunks of flesh from larger animals, including great white sharks. Discover how scientists uncovered its identity and its mysterious attacks on humans and submarines.

https://www.msn.com/en-us/news/world/when-sharks-the-size-of-cats-threatened-the-us-navy-s-most-powerful-nuclear-submarines/ss-BB1oAwpD
The cookiecutter shark was the culprit. While the Navy initially suspected the damage to be the result of a new Soviet weapon, it was actually caused by something much more unexpected: the

https://a-z-animals.com/animals/shark/shark-facts/deep-sea-sharks/
Frilled sharks live over the upper continental slope in the Atlantic and Pacific oceans in water up to 3,900 feet deep. However, they are often caught as bycatch and have been captured in water as deep as 5,150 feet. 6. Cookiecutter Shark. Size can be deceiving - cookiecutter sharks prey on animals much bigger than themselves