Merfolk are mythical creatures that are often depicted as having the upper body of a human and the lower body of a fish. They are commonly found in folklore and mythology across various cultures, including Greek mythology with the Nereids and Norse mythology featuring Aesir. Merfolk are typically associated with the sea and are believed to possess magical abilities. In many stories, merfolk are portrayed as both benevolent and malevolent beings. They may help sailors or lure them to their doom. The concept of merfolk has inspired countless works of art, literature, and film, including the famous tale of The Little Mermaid.