Twenty minutes outside Sacramento, white sturgeon the size of small dinosaurs glide through warehouse pools, their whiskers and ridged backbones a throwback to prehistoric rivers. But these aren’t museum specimens—they’re the backbone of an American caviar boom that started with an act of desperation and became an unexpected conservation success story.
Sterling Caviar has transformed Northern California into the caviar capital of the United States. The operation, which manages sturgeon at two locations—one in Elk Grove where the fish are born and caviar harvested, and another in Elverta where they mature—now supplies 80 percent of the country’s caviar. Site manager Aaron Olson describes his job with perfect candor: I like to tell people I wrangle dinosaurs. Some of their female fish, even their broodstock males, are pushing 250 pounds.
The journey from wild extinction crisis to thriving industry began in 1979, when Dr. Serge Doroshov and his team at UC Davis cracked the code of sturgeon domestication. A Soviet-born defector who arrived at UC Davis in 1978, Doroshov worked during a moment of urgency—wild white sturgeon populations on the Sacramento River were collapsing. By 1980, the first spawning of wild-caught white sturgeon happened at UC Davis. Within a decade, Sterling Caviar (then called Stolt Sea Farm) produced the first tank-raised white sturgeon caviar in 1993, and by 1994, fully domesticated white sturgeon were breeding in captivity. What started as a last-ditch conservation effort became an industry.
Raising caviar isn’t quick. Fish don’t reach harvestable capacity until six years old, though sexually identifying them comes around four to five years through ultrasound. The variables remain endlessly mysterious—Aaron Olson admits they don’t know what size, color, or grade of caviar they’re going to get before they harvest it. Even UC Davis researcher Jackson Gross acknowledges that despite raising identical fish in identical tanks with identical feed, the eggs emerge different colors. We raised all the same fish in the same tank and the same feed and everything else, and you open them up and their eggs are different. They haven’t been able to crack the code.
Yet conservation remains at the heart of Sterling’s operation. Their feed relies exclusively on sustainable fish protein and oils—no land-based proteins. The thinking is clear: the farm exists because wild sturgeon nearly vanished. Today, that problem hasn’t gone away. Wild white sturgeon populations remain threatened despite strict catch-and-release regulations for recreational fishers. Climate change and warming oceans are now the primary threat, bringing harmful algal blooms and toxins that harm wild populations far more than fishing ever did.
The full circle moment may be coming. Gross and other researchers are exploring recovery programs that could eventually return domesticated and selectively bred sturgeon back into California rivers—a possibility unimaginable two decades ago. The industry born from crisis might now become the tool for restoration.
About the Author
Andrew Johnson
Andrew Johnson is a contributor to LocalBeat, covering local news and community stories.
