Black Water

Black Water is a 2007 Australian-British horror film written and directed by Andrew Traucki and David Nerlich. The film, an international co-production of Australia and the United Kingdom, is set in the mangrove swamps of northern Australia, and stars Diana Glenn, Maeve Dermody and Andy Rodoreda. Inspired by the true story of a crocodile attack in Australia's Northern Territory in December 2003, a pregnant woman, along with her boyfriend and her sister, takes a boat tour of a mangrove swamp, where they are terrorized by a ferocious saltwater crocodile.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.