The sea otter is the only marine mammal capable of flipping over boulders on the sea floor. It does this to search for food.
Sea otters are obsessive about keeping their fur clean. They groom themselves practically non-stop when they’re not eating or sleeping.
When resting or sleeping sea otters float on their backs wrapped in kelp and often holding paws with another individual so they don’t drift apart.
To crack open hard shells, the inventive sea otter floats on its back and hits the shell on a rock that it balances on its belly.