Black Water (2007)
An Australian swamp tour turns deadly when you-know-what makes its ferocious presence known, and a married couple, along with the woman’s sister, must fight for survival. Unlike the last few entries on this list, Black Water prioritizes suspense and a sense of genuine peril, making it more in line with Crawl than, say, Killer Crocodile, despite the fact that it’s also about a killer crocodile.
