LA Times: Why are Gray Whales and Other Marine Life Visiting San Francisco Bay?
- Species conservation
- Climate change
- Population monitoring
Unprecedented numbers of gray whales are visiting San Francisco Bay, and nobody quite knows why
Published in LA Times: July 14, 2024
When Bill Keener started working at the Marine Mammal Center as a field biologist in the 1970s, there were no whales or dolphins in San Francisco Bay. The waters east of the Golden Gate Bridge were chock- full of life — sea lions and harbor seals galore — but not a cetacean to be seen.
Starting in the late 2000s, things began to change.
There are now four cetacean species living in or regularly visiting the busy waters east of the Golden Gate — harbor porpoises, gray whales, humpback whales and bottle-nosed dolphins.
...researchers aren’t sure if the animals’ presence is a sign of ecosystem health and rejuvenation or a portent of planetary disaster.
Yet Keener and other marine researchers aren’t sure if the animals’ presence is a sign of ecosystem health and rejuvenation or a portent of planetary disaster. And in each case, the story is a little different.
Please note this article is behind a paywall.
Learn More About Gray Whales
{"image":"\/Animals\/Wild\/Humpback whale\/cropped-images\/humpback-whales-feeding-photo-by-bekah-lane-c-the-marine-mammal-center-202-14-2724-2128-1709768938.jpg","alt":"two humpback whales surface while feeding","title":"Your Visual Guide to Whale Breaching, Lunge Feeding and Other Behaviors","link_url":"https:\/\/www.marinemammalcenter.org\/news\/your-visual-guide-to-whale-breaching-lunge-feeding-and-other-behaviors","label":"News Update","date":"2024-03-08 01:00:00","type":"news"}
Your Visual Guide to Whale Breaching, Lunge Feeding and Other Behaviors
March 8, 2024
Read More{"image":"\/Animals\/Wild\/Gray whale\/cropped-images\/gray-whale-baleen-shutterstock-526-1-3317-2591-1604510915.jpg","alt":"gray whale with mouth open above water","title":"Fish Feeding and Rapid Foraging Behavior Switching by Gray Whales (Eschrichtius robustus) in California","link_url":"https:\/\/www.marinemammalcenter.org\/publications\/fish-feeding-and-rapid-foraging-behavior-switching-by-gray-whales-eschrichtius-robustus-in-california","label":"Research Paper","type":"publication"}
Fish Feeding and Rapid Foraging Behavior Switching by Gray Whales (Eschrichtius robustus) in California
Read More{"type":"manual","image":"\/Animals\/Wild\/Gray whale\/cropped-images\/gray-whale-tail-shutterstock-341-0-2389-1866-1719960555.jpg","transparent":"0","alt":"gray whale tail seen above the water","label":"Cetaceans","text":"Gray Whale","link_text":"","link_url":"\/animal-care\/learn-about-marine-mammals\/cetaceans\/gray-whale","page_id":"52","person_id":null,"pub_id":null,"news_id":null,"event_id":null}
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\/Wild\/Humpback whale\/cropped-images\/a-humpback-whalesf-bay91526photo-by-norely-faz-c-the-marine-mammal-center-noaa-permit-26532-772-1-1270-992-1789760973.png","alt":"Humpback whale Rio","title":"Humpback Whale \"Rio\" Spotted in the Sacramento-San Joaquin Delta","link_url":"https:\/\/www.marinemammalcenter.org\/news\/humpback-whale-rio-spotted-in-the-sacramento-san-joaquin-delta","label":"News Update","date":"2026-09-18 12:10:00"}
Humpback Whale "Rio" Spotted in the Sacramento-San Joaquin Delta
September 18, 2026
Read More{"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"}