The cookie-cutter shark spends most of its life at the bottom depths of the sea but will swim closer to the surface to seek prey at night. These sharks live in the warmer waters near the equator.
The cookie-cutter shark, a relatively small species that grows to a length of about 20 inches, gets its name from the type of wound it leaves on its prey. It bites circular plugs of flesh out of its prey and leaves a mark that looks like it was made by a round cookie cutter. The shark's mouth acts like a suction cup, and then by rotating its body, the shark is able to scoop out a rounded chunk of meat. Because the cookie-cutter shark doesn't kill its prey, it is classified as a parasite.