This is a bad, bad B-movie. They claim there's humor but only it's clichés and TV references. A group of Marines are assigned to escort a science team from one of those research companies that experiments without considering the consequences. An experiment involving scorpions and nuclear power goes awry (as they always do). The female (who had been kept away from the males to prevent unsupervised breeding) gets loose on a military sub resulting in carnage and chaos. With a crew for munchies and males just waiting to breed - the female has a field day. How this submarine managed to float about the ocean without being spotted for two months is remarkable. I can only conclude the military simply didn't have enough in its budget to send out search and rescue. Two months is a long time to allow scorpions to run amok on a submarine. The dialogue is ridiculous, often boarding on idiotic at points. If you like watching soldiers waste bullets on non-existing targets, this is a movie to watch. I spent most of the movie hoping the scorpions would win. None of the characters are likable except Lazlo Hollyfield, an autistic science team member who doesn't live very long. Dom Paterno is one of those idiots for hire who is willing to risk multiple lives to obtain millions to return a living scorpion and an egg to the research company. His companion Ellie is only there to supply unnecessary T&A. Dr. Carly Ryan spends too much time on the Top Secret BS line companies like to give civilians and military put in danger because of company stupidity. The obvious solution to ensure the scorpions never reach the surface is to blow up the submarine. Dr. Carly and her buddy Mike (who is seriously suffering from PTSD among other things) are the only two who reach the "rescue" submersible the group had taken to the submarine. When the submarine explodes, there's no shock waves. There should be shock waves which would send the submersible careening across the screen. The submersible simply glides as if nothing out of the ordinary happened. The worst CGI appears when Mike reveals PTSD isn't his only issue. I give this a 4 because people worked hard on an obviously low budget to do the best the could.
