Narwhals are quite literally unicorns of the sea. This tusk is actually an enlarged tooth with sensory capabilities!! There are up to 10 MILLION nerve endings inside. . . . . . . . #animalplanetupclose #animalsofinstagram #animalplanet #animaloftheday #wild #wildlife #outdoors #animals #wildanimals #conservation #nature #animallovers #instanature #wildgeography #narwhal