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Walruses (Odobenus rosmarus) are large semi-aquatic mammals that live in the cold Arctic seas of the Northern Hemisphere. There are six populations in the Arctic: four in the Atlantic Ocean, one in the Pacific Ocean, and one in the Laptev Sea. Two or three subspecies exist: Odobenus rosmarus rosmarus of the Atlantic, Odobenus r. divergens of the Pacific, and Odobenus r. laptevi of the Laptev Sea, considered by some to be a third subspecies. The Pacific walrus is slightly larger, with males weighing up to 2,045 kg (4,500 lb), but Atlantic males top out at 1,600 kg (3,500 lb). |
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