San Francisco Chronicle: Why Sick Sea Lions are Washing Up on the California Coast
- Leptospirosis
Published in the San Francisco Chronicle: September 9, 2023
Experts are warning Bay Area residents to not to approach sea lions as a potentially deadly bacterial infection wracks the local population.
Sea lions that seem tired or that tuck their flippers into their sides might be suffering from leptospirosis — a bacterial infection that can cause irreversible kidney damage in California sea lions, as well as humans and dogs, according to the Marine Mammal Center and the Centers for Disease Control.
The Marine Mammal Center typically sees an outbreak of the disease every four to five years, though this is not one of those years, according to Giancarlo Rulli, public relations manager for the center.
Yes, I want to save a life!
You’ll be giving sick and injured animals the best possible care at the Center’s state-of-the-art hospital. With your gift today, you are giving a patient a second chance at life in the wild.
See Our Latest News
{"image":"\/Animals\/Patients\/California sea lions\/2024\/d-california-sea-lionsin-treatment-for-domoic-acidsausalito72624photo-by-giancarlo-rulli-c-the-marine-mammal-center.jpg","alt":"California sea lions","title":"SF GATE: Sick, disoriented sea lions are washing up on California beaches","link_url":"https:\/\/www.marinemammalcenter.org\/news\/sf-gate-sick-disoriented-sea-lions-are-washing-up-on-california-beaches","label":"In the News","date":"2026-09-01 10:39:22"}
SF GATE: Sick, disoriented sea lions are washing up on California beaches
September 1, 2026
Read More{"image":"\/Animals\/Wild\/Sea otter\/cropped-images\/sea-otter-shutterstock-118-0-2496-1950-1604015482.jpg","alt":"sea otter eating clams","title":"What Do Sea Otters Eat? And Other Otter Trivia","link_url":"https:\/\/www.marinemammalcenter.org\/news\/what-do-sea-otters-eat-and-other-otter-trivia","label":"News Update","date":"2026-09-01 02:00:00"}
{"image":"\/People\/Action\/Volunteers\/h-california-sea-lion-transportdomoic-acidslo-countydomoic-acid80524photo-by-giancarlo-rulli-c-the-marine-mammal-center.jpg","alt":"Volunteers transporting a California sea lion","title":"An Update on Domoic Acid Poisoning on the California Coast","link_url":"https:\/\/www.marinemammalcenter.org\/news\/an-update-on-domoic-acid-poisoning-on-the-california-coast","label":"News Update","date":"2026-08-28 02:00:00"}
{"image":"\/Places\/Sausalito\/cropped-images\/sausalito-front-view-by-dan-friedman-c-the-marine-mammal-center-894-0-2040-1466-1601846127.jpg","alt":"front view of The Marine Mammal Center","title":"Explore The Marine Mammal Center\u2019s Exhibits","link_url":"https:\/\/www.marinemammalcenter.org\/news\/explore-the-marine-mammal-centers-exhibits","label":"In the News","date":"2026-08-26 02:00:00"}