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Top: Science: Biology: Flora_and_Fauna: Animalia: Chordata: Mammalia: Cetacea: Odontoceti: Monodontidae: Monodon_monoceros
The narwhal, Monodon monoceros, is a medium-sized toothed whale that lives in the Arctic. It is characterized by a long, straight, helical tusk extending from its upper left jaw.
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