If by unicorns, you mean majestic marine life with a unicorn-like horn, then yes! They do! Though the existence of the narwhal might not be uncommon knowledge to all, a quick office poll is all you need to realize that not everyone has been clued in to this myth-worthy creature. The narwhal is an arctic whale with what looks like a tusk. In medieval times, this tusk was given to royalty and passed off as a unicorn horn. However, that tusk is actually a small town dentist’s dream—it’s technically a tooth that grows in a counterclockwise spiral for up to ten feet. Try fitting that with a retainer.