Whales are the main marine mammals breathe air, and nursing their young, living in the water of the sea and don't leave him, because she can't move on the sands of the beach.
Whales are the most important marine mammals, breathe the air, and nurse their young, and living in the sea water does not leave, because they can not move on the sands of the beach.
The whales are the most important for marine mammals, breathing air, and breastfeed their young lives in sea water, and leave it, because you can"t move on the sand on the beach.