#cookiecuttershark- Cookie cutters have a unique biting technique that helps them acquire food. The sharks attach themselves to their prey with the help of their lips. They then use their lower teeth to extract flesh, 2 inches wide and 7 inches deep, which they hold in place with their upper jaw, leaving behind a circular wound in their victims! Submarines have sometimes been detected with cookie-cutter bite marks as the latter mistook it for their food. They have even damaged nuclear submarines