Movies You Shouldn’t Watch If You Have Thalassophobia

List Rules
Vote up the films that trigger your thalassophobia the most.

Thalassophobia, like many other phobias, is a response to a particular stimulus. Unlike aquaphobia, a general fear of water, thalassophobia deals specifically with the unknown possibilities associated with the open sea. Thalassophobia can include fear of waves and large bodies of water. As with many other phobias, there are plenty of movies that can cause discomfort to those who have thalassophobia. Some are pretty obvious; others are perhaps a little less so. 

The following still images from sea-themed films shouldn't be overly triggering for those who have this specific phobia; however, sitting through a two-hour deep-sea adventure might cause someone to spiral. The ocean is vast and filled with mystery - these films only address a small portion of what lies beneath the surface. 


  • 1
    471 VOTES

    While the surface of the ocean is terrifying, what's underneath can be much worse. The movie 47 Meters Down (2017) utilizes the same premise as other aquatic horror films, but it does them one better by stranding its two actresses not just in the ocean with sharks - but beneath it. 

    When two sisters vacation in Mexico, they're talked into cage diving to see sharks up close. Of course, something inevitably goes wrong, and the cage ends up sinking to the bottom of the ocean, surrounded by sharks. 

    • Actors: Claire Holt, Mandy Moore, Chris Johnson, Yani Gellman, Santiago Segura
    • Released: 2017
    • Directed by: Johannes Roberts
  • 2
    464 VOTES
    Open Water
    Photo: Lionsgate

    Open Water might manage to trigger thalassophobia with its title alone. The film is based on the real-life account of two scuba divers who are left behind to fend for themselves when their dive boat fails to take an accurate headcount. Basically, Open Water is the worst film imaginable for thalassophobes.

    On top of the film's true-life inspiration and the aforementioned open water, the creators filmed with real sharks. 

    • Actors: Blanchard Ryan, Daniel Travis, Saul Stein, Estelle Lau, Michael E. Williamson
    • Released: 2003
    • Directed by: Chris Kentis

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  • 3
    263 VOTES

    Notable for its one-person cast, All is Lost stars Robert Redford as a man trying to survive in the open ocean after his boat's hull is torn open by a stray shipping container. Because Redford is alone at sea, the film has almost no spoken dialogue. Instead, viewers are thrust into Redford's shoes as he attempts to repair the ship, survive a storm, and face other hazards.

    Ultimately, the ship capsizes, and he finds himself on an inflatable life raft in the open ocean - surely a nightmare for anyone who has thalassophobia. 

    • Actors: Robert Redford
    • Released: 2013
    • Directed by: J.C. Chandor

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  • 4
    322 VOTES

    While sailing to Indonesia, a group of friends capsize their boat and try to swim to a nearby island. Unfortunately, the water is also inhabited by a great white shark. This harrowing Australian survival film - the second from writer-director Andrew Traucki - is based on a true story

    The real-life origins of this open-ocean horror story are sure to make it even more terrifying for thalassophobes.

    • Actors: Zoe Naylor, Adrienne Pickering, Gyton Grantley, Damian Walshe-Howling, Kieran Darcy-Smith
    • Released: 2010
    • Directed by: Andrew Traucki