Wilton, Calif. – On a farm just outside of Sacramento, hundreds of prehistoric-looking fish swim around in 50-foot diameter tanks. These are white sturgeon, the largest freshwater fish in North America. They’ve been around since dinosaurs, can grow more than 7 feet long and lay hundreds of thousands of eggs at a time. The roe of these sturgeon are harvested for a boutique food producer regally named Tsar Nicoulai Caviar. While a Sacramento Valley farm may seem an unlikely location for such delicacies, the white sturgeon’s native habitat is just a few miles away in the Sacramento River. When wild beluga sturgeon populations in the Caspian Sea began to plummet in the 1980s from overfishing, University of California, Davis , aquaculture experts went to work to breed the species in captivity in the state.