While the movie offers many standard Sci-Fi,B-Movie moments, several good aspects are evident. The action sequences, especially underwater scenes were filmed well,and diving enthusiasts may notice Wende Wagner's performance as vital to their success. Wende had appeared in a "Flipper" episode around same time frame, and her scuba performances are excellent. While I haven't seen this movie in many years(can't find it anywhere);the diving scenes still are memorable.