Qalupalik
The myth is that qalupaliks wear an amuatik (which is a form of pouch that Inuit parents wear to carry their children) so that they can take babies and children who disobey their parents away. The story was used to prevent children from wandering off alone else the qalupalik would take the children in her amautik under water and keep them forever.
Qalupaliks are supposed to have a distinctive humming sound so they can be heard before they appear.
(Source: diarrefpuckhookyplay-em-offs, via gosensei)