If you’ve ever walked the beach and pocketed a neat-looking rock, know that you share something in common with otters. The ...

That’s where their special pockets and their favorite rocks come in. Researchers have observed sea otters using their chosen rocks in two ways: either as an anvil, placing the rock on their ...

Off the coast of Brazil, a scuba diver captured something remarkable on video: a wrasse fish gripped a mollusk in its mouth, ...

and you never know when your favorite rock might come in handy. If you were an otter, you’d use it more often than you think. Sea otters take their rocks very seriously. The right type of rock ...

is that otters use rocks they hide in an underarm pouch to pry open shells. Hunted for their fur, California sea otters (a.k.a. southern sea otters, distinct from the northern Pacific subspecies ...

We're starting to realize how smart otters really are. They know how to play basketball. They know how to stack cups, They know how to use rocks to open clams. This type of tool use is ...