I WONDER - What Is A Selkie?

The video discusses selkies, mythical creatures from Scottish and Irish folklore, known for their ability to transform from seals into humans by shedding their seal skin. This transformation typically occurs on land, but they can revert to seal form in water. A legend states that if a human hides a selkie's sealskin, the selkie must remain on land and marry the human. However, if the selkie finds the sealskin again, it will return to the sea, leaving the human behind.

In what environment are silks said to be able to change back into seals?

What is the significance of the sealskin in the legend of the silky?