River otter Washington Department of Fish & Wildlife

PNW Paddling & Common Animal Sightings

Environmental Threats Outreach – Washington Sea Grant

River Otter Removal & Control, Trapping Company

North American River Otter

North American River Otter Missouri Department of Conservation

Otter Poop Helps Scientists Track Pollution at a Superfund Site

Party Animals Chesapeake Bay Magazine

Environment Washington - These Northern Sea Otters are listed as threatened under the Endangered Species Act. Because these otters are adorable and for many other reasons, the U.S. Fish and Wildlife Service

Counting Wild Sea Otters - Point Defiance Zoo & Aquarium

Conservation First? Lemonade-and-Learn with Washington Wildlife First and Northwest Animal Rights Network - Washington Wildlife First