Saw this as a kid 20 years later still like it. Not likely you will find this but if you do watch it. I've seen a 100 low budget flicks like this it is in the top few percentile. Has a weird cool 80s/90s movie feel mullets and all! Also full of above average gory special fx. If you like Carnosaur, critters or Leviathan you gotta see this.

An experimental submarine gets sent on a rescue mission to find out what happened to a previous similar sub. Things go nightmarishly awry when the rescue sub crew discover lethal genetic mutations deep under the ocean.Director Juan Piquer Simon, working from a silly script by David Coleman, keeps the enjoyably inane story moving at a brisk pace, maintains an engaging earnest tone throughout, generates a reasonable amount of tension, and delivers a satisfying smattering of gooey gore. The sincere acting by the game cast keeps this picture humming: Jack Scalia as rugged maverick designer Wick Hayes, R. Lee Ermey as the hard-nosed Captain Phillips, Ray Wise as shifty navigator Robbins, Deborah Adair as Wick's feisty ex-wife Lt. Nina Crawley, Ely Pouget as the sassy Ana Rivera, John Tales as likable smartaleck Joe Kane, and Tony Isbert as no-nonsense pilot Fleming. The modest (not so) special effects possess a certain hokey charm. Joel Goldsmith's robust score does the rousing trick. Juan Marine's slick cinematography provides a fairly polished look. A tacky hoot.

After James Cameron's the abyss,there were many imitations like deep star 6,leviathon,lords of the deep,this one is the best of them.with some good actors led by Jack Scalia,Ray Wise,R Lee Ermy,and Edmund Purdom.a submarine meets its fate and a rescue crew must find out why and what happened.i re watched this recently and found it quite enjoyable again.the use of miniature sets and special effects are handled very well.before cgi of course.R Lee Ermy steals the show as the gruff hard as nails captain of the siren 2.the sub assigned to the rescue.the monsters are plentiful and very realistic.hard to believe this was made by the same people who made the trashy awful slugs a year earlier.this is a Saturday matinée movie much like atomic submarine was in 1960,but flashier and with more action.it holds its own,believe me.8 out of 10

I liked the film overall. OK, I admit the acting (except for Lee Ermey at the end) was uniformly bad. The idea of a land ledge deep down in the ocean was pretty neat. Sure there were stupid mistakes, but hey this is a movie. Look, late at night I prefer mindless monster movies. Another good thing was they didn't try to make Jack Scalia too much of a macho hero. And they didn't make too much romance. When you're facing unheard-of-before monsters who has time to say silly romantic lines we see in so many other movies? There was some smartness in the plot, although I would have liked some more genetics mumbo-jumbo. The starfish monster was pretty good. I'd give it 5/10.