 Afterward, underwater scenes were shot at the Metro-Goldwyn-Mayer water tank in Culver City, with stuntmen Dick Warlock and Frank James Sparks as stand-ins for Dreyfuss in the scene where the shark attacks the cage, as well as near Santa Catalina Island, California.Fields, who had completed a rough cut of the first two-thirds of the film, up until the shark hunt, finished the editing and reworked some of the material.According to Zanuck, "She actually came in and reconstructed some scenes that Steven had constructed for comedy and made them terrifying, and some scenes he shot to be terrifying and made them comedy scenes."