Walruses are mammals. They are large marine organisms. Although they live in water, they also belong to mammals. Because walruses reproduce viviparously, they will take care of the baby walruses after giving birth, and they will not leave until the baby walruses have the ability to survive. And they are warm-blooded animals. Walruses have thick skins, which keep them warm. Even if they live in low water temperature sea areas, they can keep their temperature constant. Walruses and mammals have the same habits. Finally, walruses breathe with a lung, which is also in line with the habits of mammals. Therefore, walruses are standard mammals.

Many people think that walruses are amphibians probably because they can move on land for a short time. Although they can leave the water for a short time, their bodies have adapted to the seawater environment and cannot leave the water for too long.

Walruses are creatures living in the ocean, and they belong to marine mammals. They spend most of their time in the sea. Walruses are mainly distributed in the waters with high latitudes in the Northern Hemisphere, such as the Arctic Ocean and the Arctic region, where walruses are distributed in large numbers. There are no walruses in the sea far south.