Based on the second novel by Jaws author Peter Benchley, this underwater adventure yarn about a middle-class class couple who discover sunken treasure during their Bermuda vacation was a massive undertaking, with nearly half the film taking place underwater. The resulting photography is quite amazing, especially for the time, and many scenes have an ethereal beauty that proves mesmerizing, which makes the carefully doled out shock moments all the more effective. Unfortunately, the main characters are quite flat, which denies the film any sense of (ahem) depth. (Blu-Ray)