"Open Water" is based on the true story of Tom and Eileen Lonergan, a couple who went scuba diving in the Great Barrier Reef in 1998 and were accidentally left behind by their tour group. After being stranded in the ocean, they faced numerous challenges, including exposure to the elements and potential shark encounters. The couple was never found, and their disappearance raised significant concerns about safety in the diving industry. The film dramatizes their harrowing experience, highlighting themes of isolation and survival.

In the movie "Open Water," the couple, Susan and Daniel, are left stranded in the ocean after a scuba diving trip goes wrong. The film is based on true events, and it portrays their struggle for survival. Ultimately, the couple is not found, and the film ends ambiguously, highlighting the harsh reality of their situation. The real-life inspiration for the film, Tom and Eileen Lonergan, went missing in 1998 during a diving trip in Australia, and their bodies were never recovered.

At the end of "Open Water," the main characters, Susan and Daniel, are stranded in the ocean after a scuba diving trip goes wrong. As they struggle to stay afloat and survive, they face exhaustion, dehydration, and the threat of sharks. The film concludes ambiguously, with Susan succumbing to despair and disappearing beneath the waves, while Daniel is shown floating alone, ultimately succumbing to the ocean's dangers as well. The ending emphasizes the isolation and hopelessness of their situation.

"Open Water 3: Cage Dive" is a fictional horror film, not based on a true story. It follows a group of friends who go cage diving with sharks, only to find themselves stranded in the ocean after their cage breaks loose. While the earlier "Open Water" films were inspired by the real-life incident of a couple who went missing during a scuba diving trip, "Open Water 3" is a standalone narrative that explores themes of survival and fear in a dangerous environment without being rooted in actual events.