This environment provides a relatively safe place for flightless birds to gather, though there are still still some predators. There is food in the ocean. The arctic ocean also has a sea-based ecology. Again, migrating birds swarm to some parts of the tundra to raise their young. Seals live on fish in the arctic ocean, and polar bears prey on the seals.
Walruses dig for clams on the sea bottom with their long tusks.
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