At the Elkhorn Slough National Estuarine Research Reserve in California, hungry southern sea otters (Enhydra lutris nereis) are gobbling up the invasive crabs and keeping their numbers in check ...

In most otter species, adult females have two pairs of visible nipples. One exception is the sea otter (Enhydra lutris), ...

For generations, southern sea otters (Enhydra lutris nereis) have relied on the abundant urchins and abalone that populate the kelp forests as their primary food sources. These preferred prey ...