On a blue-sky afternoon, kayakers paddle past dozens of sea lions lolling in the sun and make a beeline toward the sea otters lounging on beds of eel grass at Elkhorn Slough on California’s central ...

Pleasant Island in Alaska is not exactly befitting of its name. The frigid, 20-square-mile island is uninhabited by humans, but it hosts a remarkably large and rich ecosystem that features deer, ...

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.