walrus, walruses, Pacific Walrus, Pacific Walruses, North Pacific Walruses, bull, bulls, males, male, Odobenus rosmarus, bering sea, bearing sea coast, coast, horizontal, marine, marine mammal, marine mammals, mammals, animals, mammal, wildlife, animal, fauna, North America, Bering Sea, group, mass, crowd, herd, haul out, hauled out, haul-out, haulout, alaska, ivory