Beneath the 12-Mile Reef is a 1953 American adventure film directed by Robert D. Webb. The screenplay by A. I. Bezzerides was inspired by Romeo and Juliet by William Shakespeare. The film was the third motion picture made in CinemaScope, coming after The Robe and How to Marry a Millionaire. The film was shot on location in Key West and Tarpon Springs, Florida.
(Summary from Wikipedia)