Narwhals are strange and beautiful creatures with long tusks protruding from their heads.
The narwhal tusk — most commonly found on males — is actually an enlarged tooth with sensory capability and up to 10 million nerve endings inside. Some narwhals have up to two tusks, while others have none. The spiraled tusk juts from the head and can grow as long at 10 feet (+/- 3 meters).
Unlike some whale species that migrate, narwhals spend their lives in the Arctic waters of Canada, Greenland, Norway and Russia. Most narwhals winter for up to five months under the sea ice.
Narwhals can dive about a mile deep (1,6 kilometers) in the ocean. Cracks in the sea ice above allow them to pop up for air when they need it.
Narwhals change color as they age. Newborns are a blue-gray, juveniles are blue-black and adults are a mottled gray. Old narwhals are nearly all white.