Watching a sea otter roll onto its belly-up float and tap a shell against a rock is the kind of quiet magic that sticks with ...

Before a sea otter dives for a clam, it often tucks a flat stone under its forearm, a pocket it keeps specifically for this purpose. On the surface, it places the stone on its chest, holds the ...

Sea otters survive largely on marine invertebrates such as sea urchins, crabs, clams, mussels and snails. Getting to that food, however, isn't always easy. Many of these animals are protected by tough ...

Sea otters are famous for cracking shells open on rocks balanced on their chests. A new study says that habit is more than charming. It can be the difference between eating and starving. Chris Law, ...

CNN — When sea otters hammer mussel shells against rocks to help open them, they're leaving behind their own archaeological record that can't be compared to any other creature, according to a new ...

Sea otters are one of nature's most fascinating creatures, beloved for their playful personalities and critical role in marine ecosystems. From their dense fur to their impressive tool use, these ...