The sea otter makes its home in cold coastal waters of the North Pacific Ocean. This mammal is about 1.2 meters long. Life in such a place is hard, but the sea otter's body and habits are a good match for it.
One reason the sea otter survives is the thickest fur of any animal, which keeps it warm, since it has no blubber. It also has a loose pouch of skin under each front leg, which lets it carry food and a favorite rock while it swims.
The sea otter is a carnivore, which means it is an animal that eats other animals. Its food includes sea urchins, crabs and clams. To find food, it floats on its back and cracks shellfish open by smashing them on a rock resting on its chest.
Young sea otters are called pups. A pup rides on its mother's belly while she floats on the water. Sea otters sometimes wrap themselves in seaweed so they don't drift away while they sleep.