By swimming to the surface - like dolphins do! :)
killer whales are mammals but they can not live on land beacause they are to big and can not walk with flippers.
Marine mammals.
The sunlit zone is the easiest of the three ocean zones in which to live. It has plenty of dissolved oxygen, marine food web life, and sunlight. It has higher temperatures and lower pressure. These are among the reasons why it's the zone of choice for aquatic mammals.
the ocean
Mammals need oxygen to breathe. Oxygen is a gas that is in the air. Without oxygen, mammals cannot live long.
Yes, even in the ocean.
fish and aquatic mammals
No. There are non-mammalian carnivores that live in the ocean, such as sharks.
Temperature, pressure and dissolved oxygen.
They are both mammals and they live in the ocean.
Nekton is the layer of the ocean that mammals that can swim under their own power live. Such as the Blowfish.
Whales do not live in any state. They are marine mammals that live in deep ocean.