Thanks a lot for a great review, bud! I actually thought I'd save myself an hour and just fast-forward through the movie, skipping most of the standard horror scenes. I saw the finale, which I liked just as much as you did for its scenery, but I couldn't spot the moment when the story of what happened to all the people is revealed. Your review helped clear that point, and I appreciate it =)
I enjoyed the movie. But, what about the bends? Seems like they were at a pretty good depth for a pretty long time. I thought you could die from this if you are not treated.
Other than that, I enjoyed the movie. And my idea for a sequel would have the hunters adapt to water and develop gills. The next movie could feature them underwater and finally emerging from the sea to ravage the 1213.