Far out from the beach, you see a person swimming in the ocean. As you watch, they dive under the water, and . . . was that the splash of a fish's tail? In this book, you'll read all about mermaids--learn about their history, discover fun facts, and test your knowledge with a quiz! You may know that mermaids are half human and half fish, but what else is unique about these creatures? How long have they been sighted? Do they have any magical abilities? And if you meet one, should you be afraid?