Narwhal 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. Each year, they migrate from bays into the ocean as summer comes. In the winter, the male narwhal’s occasionally dive up to 1,500 m (4,920 ft) in depth, with dives lasting up to 25 minutes. In winter, it feeds on benthic prey, mostly flatfish , under dense pack ice . During the summer, narwhals mostly eat Arctic cod and Greenland halibut , with other fish such as polar cod making up the remainder of their diet Physical Appearance Excluding the male's tusk, the total body size can range from 3.95 to 5.5 m (13 to 18 ft); the males are slightly larger than the females. The average weight of an adult narwhal is 800 to 1,600 kg (1,760 to 3,530 lb). Narwhals do not have a dorsal fin , and th
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