Walrus, odobenus rosmarus. Males/ bulls lying on top of each other; summer; long white tusks

odobenus warm pinniped mammal carnivorous mammals animals odobenidae hunted seal like carnivore endotherm tusk sleeping rest lying group vertebrate walruses marine resting rests fauna pinnipeds mammalian herds tusks polygamous tusked wildlife males vertebrates aquatic walross white zoology groups social sleeps dozes vertebrates bulls vertical walrus carnivores rosmarus dozing blooded long arctic water nature doze verticals endothermic vertebrate herd animal sleep 1030 11958