Legal Sea Foods Tartar Sauce. Established 1950. Restaurant. Oyster bar. Since 1950, when my father, George, first opened his fresh fish market in Cambridge, my family has insisted upon selecting, handling and selling only the "top of the catch" seafood. Our exacting standards have garnered our gourmet restaurants award after award. The name Legal Sea Foods is synonymous with quality and freshness, and now our "best of" is available for you to enjoy at home. Taste for yourself why Legal Sea Foods has become a new England legend. Top 10 tried-and-true restaurants. Bon appetit magazine. "Best seafood restaurant in America". NBC Today Show. 1-800-477-LEGAL.