The sea otter diet consists of invertebrates such as sea urchins, crabs, mussels, and squid that can cause grease to accumulate in their fur. As the otters lick their pelts to remove the grease, they ...

Some coastal wolves in Alaska, U.S., have toxic levels of mercury in their bodies after shifting from a terrestrial diet of deer and moose to a marine diet heavy with sea otters, new research finds.

Southern sea otters living along California’s coast are struggling in warmer seas, with new threats and changing food sources. They, like the other two sea otter subspecies, are classified as ...