Raft of sea otters in Sitka Sound, Alaska, USA

© Robert Harding/Offset/Shutterstoc

Teddy bears of the sea. Sea Otters

These sea otters in Sitka Sound, Alaska, know all about working together. Groups of either males or females (sometimes with pups), are called rafts, which can number more than 1,000 individuals. Their buoyant bodies act as cradles, dinner tables, any kind of solid surface, really – handy when you spend most of your life in the water. Even at nap time, they’ll raft up, wrap themselves in a strand of kelp to keep them from drifting away, and recline on the world’s biggest waterbed.