Tomales Bay
Crassostrea gigas
The definitive California oyster with stunning black and purple shells. Intensely briny with cucumber notes and a rich, buttery finish.
Flavor Profile
Finish
Rich, buttery with hints of melon and cucumber
Expert Notes
The definitive California oyster. Tomales Bay oysters are grown in bags raised off the bottom of the bay, producing stunning black and purple shells. The high salinity of the bay (33 ppt) delivers a bracing brine punch, mellowing into a rich, buttery finish with distinctive cucumber and melon notes. Tumbled varieties like the Golden Nugget develop deeper cups and plumper meat with hints of white asparagus in butter sauce. Flavor varies seasonally—saltier during droughts, sweeter during rainy months. Origin & Characteristics
- Species
- Crassostrea gigas
- Native to
- Japan
- Grown in
- Tomales Bay, California, Millerton Point, Marin County
- Size
- Medium (2-3 inches)
- Shell Color
- Black and purple with hints of blue
- Meat Color
- Ivory to light gray-green
What Experts Say
Across 10 sources, tasters describe this oyster as:
Unique notes: white asparagus in butter sauce, razor clam, black and purple shells, sophisticated
"Stunning black and purple shells with briny, cucumbery flesh. The definitive California oyster, grown in bags on racks in Tomales Bay."
brinycucumberstunning shells
"The flavor profile starts with the brine of the Tomales Bay estuary, and mellows into a rich, buttery finish, with hints of melon and cucumber. A large scallop (adductor muscle) provides a firm crisp texture."
brinybutterymeloncucumbercrisp
"They even have a tumbled oyster now, which they call a Golden Nugget. It's like a Shigoku or a Kusshi, but with a richer flavor than either, like white asparagus in butter sauce, even a bit of razor clam."
richbutterywhite asparagusrazor clam
"Lastly, we tasted four more varieties grown in nearby Tomales Bay. These were perhaps some of the most complex and sophisticated tasting oysters I've had the opportunity to experience on the West Coast."
complexsophisticated
"While the waters are the same clean, salty ones so beneficial to Hog Island's oysters, Tomales Bay oysters are bottom-grown (Hog's are off-bottom), resulting in grungier shells and a stronger flavor. Look for TBOC's new Golden Nugget oysters, one of the richest-tasting oysters in the country."
saltystrongrich
"Tomales Bay oysters are grown in Tomales Bay, California, about an hour north of San Francisco. The shells are uniformly sized, deeply cupped, ivory colored and fluted. The meat is plump and ivory colored with a clean, briny flavor."
brinycleanplump
About the Farm
Tomales Bay Oyster Company
Est. 1909California's oldest continuously operating oyster farm, established in 1909 and recently under new ownership. Originally established by Eli Gordon of the Pacific Coast Oyster Company in 1907, with oyster beds planted starting in 1909. In 1928, partnered with California Department of Fish and Game to introduce the Pacific oyster from Japan, which became the West Coast standard.
- Cultivation Method
- bottom culture
History & Background
Tomales Bay Oyster Company is the oldest continuously operating oyster farm in California, established in 1909. In 1928, TBOC partnered with the California Department of Fish and Game to introduce the Pacific oyster (Crassostrea gigas) from Japan, which went on to become the standard oyster of the West Coast. The area has been a center of California oyster culture for over a century.
Tomales Bay is the heart of California's oyster scene, attracting visitors from around the world who come to picnic on the shore and taste fresh oysters. The bay is located between Point Reyes National Seashore and mainland Marin County, about an hour north of San Francisco. Historic accounts indicate that native Olympia oysters appeared in Tomales Bay in the 1870s, shipped in by oystermen from other West Coast locations.
Did You Know?
- Tomales Bay oysters had their own railroad in the early 1900s - farmers would harvest oysters, put them on trains that ran through the picnic area, and ship them down to San Francisco
- The bay is located on a submerged portion of the San Andreas fault, with one area known as 'Earthquake Bay'
- TBOC's Golden Nugget oysters are tumbled with every tide in a dynamic system that produces deeply cupped shells and plump meat
- The area has more seals than people, and more oysters than anything
Sources & References
This information was compiled from 10 sources.
- Oyster Trail #1: Tomales Bay — The Oyster Guide
- Our Oysters — Tomales Bay Oyster Company
- Tomales Bay - California — The Oyster Guide
- History — Tomales Bay Oyster Company — Tomales Bay Oyster Company
- Epic West Coast Oyster Tasting at Waterbar — In A Half Shell
- Oysters & Chablis — The Oyster Guide
- OYSTER VARIETIES — The Seafood Merchants
- Northern California's oyster capital is a hidden gem — National Geographic
- Earthquake Bay Oysters - The Oyster Encyclopedia — Oyster Encyclopedia
- California Oyster Culture — Marine Aquaculture Extension
Learn More
The Big Five: A Complete Guide to Commercial Oyster Species
Comprehensive guide to C. virginica (Atlantic), C. gigas (Pacific), C. sikamea (Kumamoto), O. lurida (Olympia), and O. edulis (European Flat)
Read article → Biology & SpeciesThe Pacific Oyster (C. gigas): Cream, Cucumber, and the Japanese Legacy
Understanding the world's most cultivated oyster - from Japanese origins to West Coast dominance
Read article → Merroir & EnvironmentWhat is Merroir? The Science of How Environment Shapes Oyster Flavor
Understanding merroir - the marine equivalent of terroir - and how water chemistry creates flavor
Read article →