An ocean lab operating at the fantastic depth of 30 meters (about 90 feet) falls into a trench after an earthquake. The set up is good and despite the early scenes clearly being shot in a swimming pool it feels like something interesting is going to transpire. But it doesn't.An hour in and still nothing has really happened. As a final reward the viewer is treated to a parade of fish rendered huge by the inclusion of a tiny toy submarine into their environment while the bored looking cast peer out of the window saying things like "oh wow, a huge fish".I wanted to like this but being the picky viewer I am I prefer a film where something happens. When the high spot of your film is a toy submarine being mildly nudged by a bored looking crab you know there's something wrong, though at the time of writing 5% of viewers rate this as a 10/10 movie so maybe there's a market for this kind of thing.

I was completely unimpressed with THE NEPTUNE FACTOR when I, then all of twelve years old, saw the movie in its original 1973 theatrical release. When I discovered the film available on DVD, I decided to revisit it on the chance that it had simply been over my then-youthful head--and upon seeing it again realized that I was a pretty good judge of films even way back then. Simply put, THE NEPTUNE FACTOR bites a big one.The plot was hackneyed even in 1973: an earthquake shakes up an undersea lab and a "special submarine" is dispatched to find out what has happened down there. They go down, down, down to the bottom of the sea, they look out the submarine window, and they see... some really big fish. Yep, that's about all there is to it. They look at some really big fish.Now, the cast itself isn't bad at all. After all, it includes Walter Pigdeon, Ben Gazzara, Ernest Borgnine, Yvette Mimieux--and they are very capable players. And they give it their all, but they just can't get a lot of mileage out of it, particularly when the really big fish are just really big (and pretty grainy) close ups of little fish that you might find in somebody's home aquarium. And then there's the submarine itself, which is clearly a plastic model, and which seems to have filmed at the bottom of a kiddie wading pool with some plastic seaweed stuff thrown in.If this sounds boring, well, it is. Now and then a really bad film can become accidentally entertaining. It may be so bad that it's astonishing, as in PLAN 9 FROM OUTER SPACE. It may be so bad that it's endearing, like ATTACK OF THE 50 WOMAN. But most bad films are just dull and boring, and when it comes to dull and boring THE NEPTUNE FACTOR is working hard to lead the pack. Give it a miss.GFT, Amazon Reviewer

This is an adorable little kids movie from the '70's. 5 stars is pushin it for this one, though. It's not bad but its by no means good. It's just really endearing, in its own out-dated way. So, OK, you've got Ben Gazarra, Ernest Borgnine, and superhuge seahorses in an undersea adventure/race-against-time-kind of thing. I wonder if the guys and 'bots over at MST3K ever got a hold on this one? It would be perfect material for them. It's lame in a wonderful way. If you like Benny Gazzarra, and/or Ernest Borgnine, and would possibly be interested in seeing them marvel at superhuge seahorses when they're in this superdeep sea rift, then I think you should see this movie. No. I urge you to see it.

Wow, an underwater film shot completely on location - at the bottom of the production designers' fishtank! This action-drama basically involves about 80 minutes of the main characters staring out of their mini-sub's windshield/projection screen with awestruck expressions at... grainily blown up shots of common acquarium fish. The "model shots" (a generous naming) actually DO look to have been shot in a common home aquarium, complete with plastic ferns and oversize gravel. The stretch is so great, the disparity so big, I didn't know whether to laugh or cry. I think in the end I simply gave up and decided to vomit. Not sure how Walter Pidgeon took a wrong turn into this turkey, but it is worth noting that about half the cast of "The Black Hole" is featured here - doubtless in a dry run for their performances in that later classic...