An otter plays endlessly with a rock, delighting in joyful antics and watery fun.

Sea otters are the smallest marine mammals, but they have some incredible adaptations to thrive in the ocean. Unlike seals and whales, they don’t have a thick layer of blubber to keep them warm.

If you’ve ever walked the beach and pocketed a neat-looking rock, know that you share something in common with otters. The only difference is that an otter might carry its favorite rock forever, ...

There’s a lot to discover about the smallest species of otter — here are some fun facts about them. Mike Bock On the rocky banks of a trickling freshwater stream, the otters are on the move. The ...

A rescued sea otter is now fully integrated into the otter group at a renowned aquarium near Michigan. Jade can be seen bonding and playing with the raft (the name for a group of otters) at Shedd ...

Otters are well known for their playful, energetic, and inquisitive behavior. However, did you know that otter play has a purpose other than just having fun? Or that otters are some of the most ...

Forbes contributors publish independent expert analyses and insights. Amanda Kooser covers the quirky side of science and space. A wolf examines a rock in northern Minnesota. The rock has a dab of ...