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Photo Gallery: Walruses

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Atlantic walruses look for some personal space in Alaska's Togiak National Wildlife Refuge. Both male and female walruses grow tusks, which are simply canine teeth that continue to grow throughout their lives. Tusks range in shape and size and are not proportionate to body size. Some walruses have been found with tusks protruding 3 feet (0.9 meters) from their mouths. Photograph by Joel Sartore