Sea otters are North America’s smallest marine mammal, weighing just 30 to 100 pounds, but their appetites are huge. They burn calories at three times the rate expected for their size, chomping on ...

Advocates say Southern sea otters are thriving in California’s Elkhorn Slough, but could face new risks if a proposed law change weakens the Endangered Species Act.

A Silicon Valley-based nonprofit has raised about $1.4 million of its $40-million target to protect California coastal sea ...

A California aquarium re-released a vintage sea otter T-shirt on Thursday, raising more than $2.1 million after "Swifties" ...

A study comparing the nutritional demands of killer whales with the caloric content of their prey has startling implications for the potential impact of these large predators on populations of other ...

You might think river otters would be deathly afraid of alligators. After all, alligators do prey on otters. However, would you believe that sometimes it’s the other way around? A video taken in ...