Long ago, sailors told tales about terrible monsters that lurked in the sea. Many of their stories may have been based on amazing—but real—sea creatures. Giant squid catch their food with tentacles and fight huge sperm whales. Manatees breathe air and must eat 100 pounds of food every day. Fifty-foot long oarfish have silvery, snakelike bodies. What monsters could they have inspired? Find out more about these real-life sea monsters and the scary stories sailors told about them!