 Some exterior scenes, such as the sword fight between Rathbone and Flynn, were shot on location at Laguna Beach, California standing in for a Caribbean shore (specifically, the fictional island of Virgen Magra, which translates from Spanish as "lean [as in meat] virgin").The final battle sequence between Blood's pirate crew and the French ships used one of the largest technical crews assembled for a film, requiring 2500 extras.For sea-battle footage, Curtiz used a combination of process shots, miniatures, and footage taken from "The Sea Hawk" (1924).