Unicorn of the Sea Knee High Socks

Narwhals actually get mistaken for swimming unicorns all the time; it's really quite a bother. They'll be swimming along the surface, minding their own business, when someone will grab them by the horn and demand magical powers. All the narwhal has to do is show his face to be let go and swim away without suspicion, all the while knowing their powers are ten times better than any unicorn's.