We probably aren’t talking about Ariel and Triton, here, but there have been reports of mysterious pseudo-humans living in the water for thousands of years. There are even cave drawings located at the edge of long-dry ocean beds in the Egyptian desert that seem to depict a group of regular old two-legged people being threatened by creatures that have the torso of people and the tails of fish—and are brandishing spears. One of the prevailing theories of these creatures is that they are an evolutionary hiccup that happened when our ape-like ancestors wandered to the edge of the ocean and eventually just wandered right on in. It is thought that mermaids cooperate with deep ocean animals to hunt for food and stay out of sight of humans. Just don’t tell Flounder.