From Inuit mythology, Qalupaliks are water beings who live under the ice. They look like humans but they have long hair with green skin, long fingernails and green skin. They wear an amautit, which is a form of pouch that Inuit parents wear to carry children so they can take away children/babies that misbehave.
According to the myth, there is no way to get your child back once a Qalupalik takes it, but they make a distinct humming sound before they appear.聽