Ugh...don't bother
For you intrepid travelers looking for some (relatively) undiscovered gem of the horror genre, don't bother. If you're like me and were buoyed by numerous positive reviews, despite the low IMDB rating, and were hoping to savor the brilliant effects of the once great Rob Bottin, don't be fooled. This film is really weak. It's primary downfall is that every single character is either supremely unlikable (the heavily armed bandits, all a bunch of uber macho jugheads), or cartoon caricatures who more resemble the artifice of a Hollywood script writer than real people.
Here's my encapsulation of the film: Bandits board luxury vessel. Bandits and company scream and shoot at tentacles and act predictably stupid. Bandits die uninteresting deaths one by one. Bad attempts at recreating the whimsical humor of Bill Paxton from Aliens are attempted by Kevin O'Connor and fail miserably. The "good" people you expect to live actually live. The "bad" people you expect to die actually die. Viewer risks lockjaw from incessant yawning.
This movie totally sucked. Big disappointment to me. If you've already treated yourself to TRULY excellent horror films like The Thing, you'll surely deem this film a turd. If you're really hard up for some horror films made in the past 10 years, go with The Mist instead.
This movie most definitely deserves its 5.5 rating, if that.
YOU HAVE BEEN WARNED.