As a big fan of B Movies, I've seen my fair share of films about marine based dinosaurs, normally their shoehorned into being about the Loch Ness Monster, but the crew of Poseidon Rex blew most of their budget on a more exotic location, so this time we're off to Belize for our prehistoric nonsense.
The plot, following a thoroughly uncharismatic swashbuckling rogue of a treasure hunter (played by Brian Krause. I've no idea what I've seen Brian Krause in before, but his appearance prompted me to blurt out "oh off not him again") who manages to accidentally free a hitherto unknown prehistoric predator while searching for Mayan gold. He finds himself teaming up with the Coast Guard, a busty marine biologist, 2 holidaymakers and their diving instructor to put an end to the menace before it destroys Belize.
It's largely by the numbers stuff, with the only real surprise being how brutal it is with some of the main cast's mortality. We've got a villainous human more concerned by chasing Jax for his gold than the fact there's a bloody great man eating dinosaur tramping about behind him, the race against time as the military threaten overly aggressive action and the stock 'shock' ending that anyone with an ounce of self-awareness will see coming, but it's really not all that bad. I mean it's stupid (the P-Rex apparently has a mean pair of stilts to let it stand at full height over a boat in the MIDDLE OF THE OCEAN) the CGI is pants and the acting is average at best, but it has a certain honest charm to it. It knows what it is and doesn't try to do anything smart.
I'd be lying if I said I ever wanted to see Poseidon Rex again, or will even really think about it the minute after I hit 'Submit' on this, but the fact it knows its place as a film about a bloody great dinosaur attacking a secluded community, yet doesn't degenerate into a horrible semi-parody that winks at the audience in a "we know this sucks, but isn't it funny?" way like the 300 Shark-variation films on the market right now really endears it to me. If you like B Movie nonsense, there are worse ways to spend a night, but at the same time you probably would be better off digging out Godzilla or The Beast from 20,000 Fathoms.
Review by Golden_Brown from the Internet Movie Database.