Some of the best uni, sea urchin, is from here locally in San Diego off the shores of La Jolla. Many of the sushi bars get their supply from Catalina Offshore in the Morena district. They’re a wholesaler but you can walk-in and purchase fresh uni along with other fresh seafood, they’ll open on Saturday between 9-11:30 and Mon-Fri 9-2. Shirahama Sushi uses local uni, but they’re seems bigger and tastier than the ones from Catalina Offshore…wonder where he gets it from.
There is also a vendor at the Farmer’s Market in Little Italy that sells fresh uni in the shell. Have yet to try it but it looks good.