Nature: Season 21 Episode 13

A Mystery in Alaska

The Steller’s sea lions that populate the Alaskan coastline are powerful, playful, and sometimes rowdy creatures who bump and jostle each other on land but acquire a sublime gracefulness in the water. They are also the subject of a strange and tragic mystery: Steller’s sea lions are rapidly disappearing from one of the last great wildlife strongholds of the world, and no one knows why.