sea otter mom and pup

Happy 40th Endangered Species Act!

On December 28, 1973, the Endangered Species Act (ESA) was signed into law.  Four years later, in 1977, California’s southern sea otter (Enhydra lutris nereis) was listed under the ESA as a threatened species – a conservation status which remains to this day. With the current population estimated at only 2,900 animals, sea otters still […]

Toxoplasma gondii - sea otters

Sea Otter Science: Study Reveals New Transmission Route for Land-derived Parasite T.gondii

A New Pathogen Transmission Mechanism in the Ocean: The Case of Sea Otter Exposure to the Land-Parasite Toxoplasma gondii Fernanda F. M. Mazzillo, Karen Shapiro, Mary W. Silver Published: December 18, 2013  |  DOI: 10.1371/journal.pone.0082477 Abstract Toxoplasma gondii is a land-derived parasite that infects humans and marine mammals. Infections are a significant cause of mortality for […]

Otter Tracker - sea otters

Introducing “OtterTracker”

Have you ever wondered where sea otters swim along the California coastline throughout the year? Introducing Otter Tracker! Why do scientists capture, tag and track sea otters? Capturing, tagging and tracking sea otters help scientists gain a better understanding of how they live and the contributing factors threatening the recovery of the species.  By surgically implanting […]

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About is dedicated to raising awareness about California's threatened sea otters and the role research plays in the species recovery and conservation. It's a collaboration of the Monterey Bay Aquarium, U.C. Santa Cruz, U.C. Davis, U.S. Geological Survey, U.S. Fish & Wildlife Service, California Department of Fish and Wildlife, among others. is also home of the world's first HD live stream of southern sea otters in the wild.