Sea Otters Eat Crabs Four (IMAGE) Duke University Caption The return of sea otters, a top predator, to a California estuary is helping slow erosion and restore the estuary’s degraded geology. A sea otter in the estuarine water of Elkhorn Slough, Monterey Bay, California, USA. Credit Emma Levy Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.