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Whales in San Francisco Bay

Roughly 30 gray whales have been spotted in the Bay this season, many more than is typical. Sadly, there have also been at least 14 deaths this year, which is more than in all of 2024. 

We are investigating to help determine the cause of these deaths. By gaining insights into what is causing these tragedies, we can better understand how to help prevent them.

Learn more
gray whale fluke
Carlos Rios looking at a sample in the laboratory
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Leptospirosis

California sea lion Pammysue

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California sea lion with mouth open

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northern elephant seal Mardi peers up from inside an enrichment item made from PVC pipe, fake kelp and red buoys

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The Marine Mammal Center’s experts are leading contributors to global knowledge about marine mammal health, including developing innovative medical techniques and conducting vital research that has revealed alarming ocean health concerns.

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Recent Publications

three sea lions on the beach

Research Paper

Evaluation of Two Serologic Tests for Rapid Detection of Anti-Leptospira Antibodies in California Sea Lions
three California sea lions being released into the ocean

Research Paper

The Toxic Effects of Environmental Domoic Acid Exposure on Humans and Marine Wildlife
sea lion on rock

Research Paper

Klebsiella pneumoniae in stranded california sea lions (Zalophus californianus) of central California between 2017-2022
Dr Cara Field conducting an exam on a harbor seal pup

Research Paper

Zoonoses in the workplace: A Seroprevalence study of Coxiella, Brucella, and Leptospira among marine mammal rescue and rehabilitation workers in California
harbor seal

Research Paper

Comparative pharmacokinetics of a single oral dose of meloxicam in the California sea lion and Pacific harbor seal
California sea lions on rock

Research Paper

Identification of Candidate Protein Biomarkers Associated with Domoic Acid Toxicosis in Cerebrospinal Fluid of California Sea Lions