The photography in this one is great, by the way, and it's worth watching the movie for that alone. But if that's not enough, you also have Gilbert Roland, Robert Wagner, Terry Moore, J. Carroll Naish, Peter Graves, and Richard Boone. Admittedly the story they're in doesn't give them a lot to work with, but they're all great to look at, especially Terry Moore. Or, if you're more into beefcake, Robert Wagner.
The story isn't all that great, even though the screenplay is by A. I. Bezzerides. It's the Hatfields and McCoys in Florida, with sponge divers. Don't worry about that part. Enjoy those underwater sequences and the great color.
A DVD of this movie was available everywhere for a buck a few years ago. I'd recommend watching it in a better version if you can find one.