In this environment the animals have adapted to survive in the cold weather. The seal has physically adapted, such as its rubber like skin that can help keep out the cold weather. Also like the peguin with its feathers. Although th etwo must fight for food they both survive and adapt in this enviornemt.
In this picture we see sea turtles in the environment. When they are young they must go into the ocean as quickly as they can to aviod getting eating. This is one part of natural selection. Those with larger fins and who are the fastest have an increase of survivng.