North American River Otter Facts
Rescued sea otter pup Earle is newest addition at Oregon Coast
Otters 'Juggle,' but the Behavior's Function Remains Mysterious, Smart News
Saving Sea Otters
Experience Baby Otter Adorableness, Times Three, at the Aquarium of the Pacific – NBC Los Angeles
North American River Otter
Otter - Wikipedia
Sea otters stay warm thanks to leaky mitochondria in their muscles
North American River Otter
Yes, you can swim with otters, and it's just as adorable as it sounds
Otter Fact Sheet, Blog, Nature
Alaska SeaLife Center Admits Sea Otter Pup Patient