Not a bad effort, really, given that the film was made during the age of Cousteau. Underwater filming of deep ocean life had not been accomplished. Now we know what it looks like way down there, so the fish tank 'special effects' really ruin the story. The first sight of a clown fish is like a slap in the face! The film becomes a comedy after that! But really, this is only because science education (as miserable as it may be) has advanced SO MUCH on television. Now we can sit on our sofa and watch animal planet to get a better seminar on deep ocean life than marine biologists of the day received! So, if you're looking for a top-notch special effects masterpiece, the toy sub floating in the Monterey Bay aquarium's fish tanks probably won't cut it. Nevertheless, it's an entertaining few minutes, anyway. I say, watch it and try to forget about reality for a while. Pretend you're TEN!