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  1. Avian Influenza and Marine Mammals

    Avian influenza continues to affect marine mammals along our California range. The risk to the public remains low. See our latest updates and guidance on how to protect yourself, your pets and marine mammals — and how you can help.
    Learn more
    Elephant seal at Año Nuevo

  2. You Can Help Conservation Efforts by Whale Watching

    Gray whales are migrating along the California coast right now. Find out where to see whales from shore, and how you can report your sightings to help protect these gentle giants.
    Dive In
    Gray whale

  3. Join us for Marine Science Sunday

    Explore ocean life with our expert educators through captivating photos, science, and stories of amazing marine mammals. These free, interactive programs happen on the 2nd and 4th Sundays in Sausalito. Come visit us, each month brings a new ocean theme!
    Learn more
    Marine Science Sunday

  4. Help save a life!

    Your generous gift today will provide the food and medical care a pup like Fuzzball needs to recover. 
    Donate today
    California sea lion Fuzzball

Visit the World’s Largest Marine Mammal Hospital — Book Your Free Tickets Today!

Reserve Tickets Today!

See experts providing life-saving care to patients so they can be released back to the wild. Tickets are free but must be reserved online in advance. Hurry, spots fill up fast! 

view of the ocean from the front patio with sea lion sculpture in the foreground

Plan Your Visit

exhibit hall at the marine mammal center

See Our New Exhibits

tour guide with a group at the Observation Deck looking out at patients

Explore Our Tours & Programs

Celebrating 50 Years of The Marine Mammal Center

What We're Working On

humpback whale breaching in front of San Francisco

Cetacean Conservation

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

Enrichment

Hawaiian monk seal tangled in fishing gear

Ocean Trash

harbor seal Woody eating a fish

Sustainable Seafood

whale feeding with oil rig in background

Climate Change

Two Hawaiian monk seals sleeping on the beach.

Hawaiian Monk Seal Conservation

California sea lion with mouth open

Cancer

Ways to Give

Your support makes life-saving work possible. Our patients rely on the generosity of people like you. There are many different ways to make a gift today and help return marine mammals to a healthier ocean home.

Donate Now

humpback whale leaping out of the water

Make a Gift in Honor/Memory

group of harbor seals at the marine mammal center

Adopt-a-Seal®

trio of California sea lions returning to the wild

Leave a Legacy Gift in Your Will

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Platinum Seal of Transparency 2026
2025 top rated nonprofit award
1 Percent for the Planet

What's New

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Stay up to date on the latest news from The Marine Mammal Center by signing up for email updates.

wild northern elephant seal at ano nuevo state park

Avian Influenza Confirmed in Northern Elephant Seals

A bottlenose dolphin jumps out of the water.

What’s the Difference Between Dolphins and Porpoises? And Other Animal Trivia

Sea otter - Mooring

Rescue Stories: Southern Sea Otter Mooring Named the 2025 Patient of the Year

Adopt An Animal

See All Patients
southern sea otter, Mooring
threatened

Mooring

Southern Sea Otter — Female
Released
northern fur seal Reina

Reina

Northern Fur Seal — Female
Released
northern elephant seal Shrub with enrichment items including fake kelp and a red buoy

Shrub

Northern Elephant Seal — Female
Released

Our Impact in the News

See all press coverage

Interested in talking to our experts? Contact our media team.




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two gray whales under the Golden Gate Bridge
Press Release

The Marine Mammal Center and San Francisco Harbor Safety Committee Pilot New Vessel Operator Training Program

February 6, 2026

Read More 
{"image":"\/People\/Action\/Veterinary care\/cropped-images\/Harris_Green turtle_TMMC-0-0-1270-992-1767649941.jpg","alt":"Heather Harris","title":"Seattle Aquarium Awards Dr. Heather Harris With Prestigious Conservation Research Award","link_url":"https:\/\/www.marinemammalcenter.org\/news\/seattle-aquarium-awards-dr-heather-harris-with-prestigious-conservation-research-award","label":"In the News","date":"2026-01-05 04:48:00","type":"news"}
Heather Harris
In the News

Seattle Aquarium Awards Dr. Heather Harris With Prestigious Conservation Research Award

January 5, 2026

Read More