Understanding cookiecutter sharks

A little understood species of shark, known for taking cookie cutter-shaped bites out of everything from white sharks and whales to the rubber coated sonar sensors on submarines and even underwater electrical cables, is the subject of a new study. While the deep sea dwelling Cookiecutter shark will take a chomp out of anything it encounters in the upper reaches of the ocean, it really feasts on crustaceans, squid and small fish found in their habitat.

source https://www.sciencedaily.com/releases/2021/08/210823125805.htm