Kappa (folklore) - Wikipedia
A kappa (, , river-child), also known as kawatarō (, , "river-boy"), komahiki (, , horse-puller), or kawatora (, , river-tiger) is an amphibious yōkai demon or imp found in traditional Japanese folklore.They are typically depicted as green, human-like beings with webbed hands and feet, with a turtle-like carapace on its back.