31. Mermaids (Well Sorta)
The real story behind mermaids is quite compelling. They were first mentioned centuries ago, and they play big roles in mythological stories. Homer even makes mention of them during The Odyssey. It was believed that these half-human/half-fish creatures were capable of drawing people in with their siren song.
This forced ships to crash attempting to get close or made men want to jump into the waters to meet up with them. It turns out that a lot of these sightings were in areas where the wind was capable of blowing in such a way that it made an almost musical whistling noise. People would sometimes assume they see a human through these often foggy places and get attacked by various animals like manatees and sea lions, as well as some whale species when jumping in.