15 Facts You Didn’t Know About Sharks

Yes, cookiecutter sharks. Perhaps one of the silliest named sharks, these little pests are parasitic and only grow up to about 20 inches in length. For their size, they still have enormous sets of teeth that open into a round patter, like a cookie cutter. They latch their teeth onto practically any kind of prey, from whales to other sharks to bony fish to the hulls of ships, then they wriggle their bodies to wrench flesh away. They can leave "crater wounds" up to five inches wide and seven inches deep.