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For both sexes, excluding the male's tusk, the total body size can range from 3.95 to 5.5 m (13.0 to 18.0 ft); the males are slightly larger than the females. The average weight of an adult narwhal is 800 to 1,600 kg (1,800 to 3,500 lb).
Indeed, the narwhal is armed with a sort of ivory sword, a halberd, according to the expression of certain naturalists.ndeed, the narwhal is armed with a sort of ivory sword, a halberd, according to the expression of certain naturalists.