Slow moving, docile, slightly stupid creatures aren’t usually really, really scary. Take a cow, for instance. Not scary. Or a slug. Not scary. But a manatee? Well, according to one person, at least, sea cows are the scariest thing in the ocean. They are, after all, vicious, mean spirited creatures that have a penchant for bloody, open water violence. If anything, our fear of sharks should be transferred to manatees. Take this horrifying attack, for example: