I watched “the last unicorn” not long ago… and the legend in that movie is that a greedy sorcerer wanted all of the unicorns for himself. Acting on his desires, he captured all of the unicorns and cast them into the sea. Every morning when the sun rises, the unicorns ride the tide in… only to be carried away as the day continues… never reaching the shore.
Somebody saw some Narwhals riding the tide and was too blind to realize they were whales and not, in fact, beautiful horned horses. TRUE STORY.