At a promotional event, a young Jayne Mansfield was one of several swimmers participating in a underwater skit when the top of her bathing suit came off. Many believe that she let it happen on purpose for free publicity.
After spending months in Hawaii shooting underwater material, the crew lost a barge full of cameras and equipment worth hundreds of thousands of dollars. They were there during the storm season, and the water was so murky production moved to Jamaica, only to face the same problems. John Sturges didn't like the screenplay, and recruited screenwriter Walter Newman to rewrite it as they were about to start shooting.
Promoted as RKO's first production in SuperScope, like all the rest of the so-called "SuperScope" productions, this was filmed in the standard academy ratio of 4:3, then cropped top and bottom in the Technicolor labs for wide screen "SuperScope" presentation. No special cameras or lenses were used for this process.
Approximately 60% of the way into the film, both internal and external scenes are reversed. The cabin of the boat suddenly is reversed and shortly thereafter, the deck scene is also reversed. The name of the boat on the life preserver is a mirror image.
Jane Russell arrived regularly late on the set, while the whole crew waited for her.