Margýgr, or sea giantess, is a creature from Scandinavian mythology and folklore, similar to a mermaid. In Icelandic sagas and legends, she is described as a huge and terrifying sea woman with a fish tail, long arms, and hair.
Margýgr dwells in the ocean and is often associated with the dangers of the sea, as she can capsize ships and drag sailors to the bottom. This image reflects the ancient Scandinavian people's fears of the unpredictable forces of nature and the sea.