Researchers observed wild narwhals using their tusks to hunt fish, hitting and stunning them to make the fish easier to consume. ... The tusk is actually a tooth that spirals out of the upper jaw on male narwhals, and can extend to about 10 feet (3 meters) long, according to the World Wildlife Fund (WWF) Canada.May 23, 2017
The narwhal (Monodon monoceros), or narwhale, is a medium-sized toothed whale that possesses a large "tusk" from a protruding canine tooth. It lives year-round in the Arctic waters around Greenland, Canada, and Russia. It is one of two living species of whale in the Monodontidae family, along with the beluga whale.
Males reach between 4 and 6 m (13 and 20 ft.) and can weigh 1,600 kg (3,500 lb.). Once they are mature, females will give birth to a calf once every 3 years. The pregnancy lasts for about 14 months, and calves are born in the spring. Like many other whales, narwhals travel in groups.Feb 24, 2017
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.
Narwhals are mostly hunted by polar bears and orcas. Native Inuit people are also allowed to hunt this whale legally. In addition, the narwhal's habitat is threatened by the effects of climate change and pollution.