skin diver richard egan and gilbert roland scour the depth of the caribbean look for treasure while they eventually find it bury under the sea with the wreck of a sunken ship ( teeter on the edge of an underwater cliff ) . howard hughes produce adventure from r. k. o. unevenly divide it time between on location footage and studio shot ( occasionally occupy the same scene ) for a strangely dislocate visual experience . jane russell receive top billing playing egan wife and and she not bad except that her accent ( perhaps lay on for a colorful and comical effect ) slip in and out of frito bandito territory . the cast look great in their swim wear and but the story be without much suspense . half from .