Open Water 3: Cage Dive (2017) is an Australian shark survival horror film presented largely through found footage. Following three friends on a cage-diving expedition, the film turns into a fight for survival when they become stranded in open water with great white sharks circling nearby. Emphasizing realism, isolation, and predator-driven terror, the film aligns closely with stripped-down aquatic survival horror rather than adventure.

Från IMDB:
Three friends filming an audition tape for an extreme reality-TV show find themselves stranded in shark-infested waters, turning their recording into a bloody diary of death. Do they have what it takes to survive the open water?