This social whale is known for the VERY long tooth that males have. Very little is known about this whale.
All narwhals have two teeth in their upper jaw.
After the first year of a male narwhal's life, its left tooth grows outward, spirally. Tusks are usually twisted in a counterclockwise direction and have a hollow interior. The tusk is not used in hunting. This compact body shape plus a thick layer of blubber retains heat in the icy Arctic waters in which they live. They rarely stray far from ice.