Explore the river otter rebound and learn about efforts to restore their populations and habitats across North America.

California sea otters have been poisoned by the microcystin toxin. This sea otter pup is healthy. (Photo by R. Wilder, Monterey Bay Aquarium) A potent toxin produced by bright-green blooms of ...

I’m sure you could guess the most prevalent difference between river otters and sea otters. Yes, one species lives in freshwater, while the other lives in marine environments. But did you know that ...

Otters are carnivorous mammals in the Lutrinae branch of the diverse Mustelidae family, which includes weasels, badgers, stoats, wolverines, and ferrets, among others. There are 13 living otter ...

Otters are well known for their playful, energetic, and inquisitive behavior. However, did you know that otter play has a purpose other than just having fun? Or that otters are some of the most ...

There’s a lot to discover about the smallest species of otter — here are some fun facts about them. Mike Bock On the rocky banks of a trickling freshwater stream, the otters are on the move. The ...