Jon walks into the ocean. The water activates the magic in his pelt, his legs changing into flippers bringing the rest of his body under the water causing further changes.
He turns to go back to the shore ready to take the pelt off but a feeling from out in the ocean stops him. Turning around he swims out into the open ocean.
A seal is their waiting for him.
"Welcome. It is nice to see another selkie has awoken. First up, magic is returning, and thouse of us with mythic ancestors are being turned into mythical creatures.
We are selkies. You have a seal pelt which you put on to turn into a seal. According to the myths though females like yourself end up having your pelts stolen and forced to marry the human who has stolen it. Any other questions I can answer while I show you home?"