"Don't drink the ocean, K'nuckles! Seawater makes you crazy! Look at me! I've been drinking it for hours!!! NYEHAHAHAHAHAHAHA!"
Related to Space Madness
Being away at sea for a long time seems to take its toll on your mind. Maybe it's the unchanging landscape, maybe it's being away from your loved ones. Either way, in period pieces and even sometimes in modern ones, you can expect any characters away on sea for extended periods of time to go crazy.
Historically a Truth in Television
. In addition, there's a lot of validity to the "don't drink seawater" idea, since salt water has the nasty effect of making you even more
dehydrated, which can lead to delirium. And, y'know, death.
Compare Cabin Fever
Note that this is no excuse for ocean rudeness
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Anime & Manga
- Hikari and Ken from Digimon Adventure 02 go mad (or at least have very bad FreakOuts) whenever they return to the Dark Ocean
- Though it's less from the usual reasons, and more because they basically stumbled into a Cosmic Horror Story.
- In the Omake episode of Moon Phase, Seiji Mido has gone completely mad from being trapped out at sea for several weeks. Though he could be considered the Only Sane Man, as everyone else is completely blase at their house being intact and floating in the middle of the ocean (the giant cork just has to be left alone).
- The Rime of the Ancient Mariner is essentially about a crazy old man accosting a random guy in the street and making him listen to an extremely gruesome experience of Ocean Madness. Hopefully. Because if he was actually sane when he saw all that stuff out there...
- In China Miéville's The Scar, Hedrigall decides to leave Armada, the floating city, and spends some time alone at sea. After he is found he has been driven mad by seeing his entire city destroyed.
- Cryptonomicon has Goto somehow managing to swim all the way from open sea to New Guinea. As an Okinawan who grew up in the sea, he knows damn better than swallowing the sea water. Problem is, he's swimming with a Tokyo city mouse, who doesn't knows any better... and after swallowing the sea water for a while, he slowly starts losing it, until he collapses in the shore while laughing sardonically...
- Captain Wolf Larson, in Jack London's novel The Sea Wolf, starts off as a sadistic Nietzsche Wannabe, but degenerates into a full-blown psychopath with a death wish.
- From Nation: "Calenture...meant a special kind of madness...sailors got [it] when they'd been becalmed at sea for too long. They'd look over the side and see, instead of the ocean, cool green fields. They'd leap down into them and drown." Although, since it's First Mate Cox doing the explaining there, it's possible that he pushed them in himself.
- Terry Pratchett had already mentioned the phenomenon in Going Postal, where he uses it as an analogy for what happens to clacks operators after a while.
- Likely happened to Pi in Life of Pi, becoming most of the conflict in the story (the rest being stuck on a boat with a tiger.)
- Inverted in John Masefield's "Sea-Fever":
I must go down to the seas again, to the lonely sea and the sky,
And all I ask is a tall ship and a star to steer her by,
And the wheel's kick and the wind's song and the white sail's shaking,
And a grey mist on the sea's face and a grey dawn breaking.
- Lampshaded by Wolf Boy in Septimus Heap, who thinks that he'd be driven to madness by the vastness of the sea.
Live Action TV
- In the TV-movie of Noah's Ark, after the rain ends, the ark drifts for weeks across a sun-drenched and scientifically impossibly dead calm sea, and Noah and his sons and daughters-in-law all gradually go around the bend. However, Noah's wife, being the Mommeee, is supposed to be an infinite source of self-sacrificing nurturance, so when she starts to crack, all the other characters stare at her in shocked amazement and suddenly go sane again.
- On LOST the crew of the freighter is slowly going mad while anchored near the Island. However, the main cause is the time-twisting effect of the Island rather than just being at sea.
- One surreal bit-scene on The Young Ones featured a couple of rag-clad men lying on a ramshackle wooden raft. As they discussed whether or not they were hallucinating, their raft alternately appeared floating at sea, then lying on the floor in a cellar, then lying in the cellar of a house that was floating at sea.
- The background for the villain Cannibal from the Dark Champions sourcebook Murder's Row involves him going mad while stranded on the ocean in a lifeboat and discovering he has taste for human flesh...
- Sunless Sea, the Fallen London spinoff. "Go Insane, Eat Your Crew" is one of its main slogans, and indeed one of the major challenges of the game is keeping the terror of the Unterzee from driving your crew violently insane.
- In The Simpsons, Homer, Bart, Ned and Todd start to succumb to this after they get stranded out at sea in a raft.
- The Trope Namer is Futurama, despite this instance actually being a Cassandra Truth. When the crew gets stranded underwater, Fry sees a mermaid, resulting in everyone brushing it off as ocean madness. However, Fry really did see a mermaid, and no one actually goes mad.
Fry: "Everytime something good happens to me you say I have some kind of madness. Or I'm drunk. Or I ate too much candy."
Leela:"It's ocean madness all right, the sailors call it "Aqua Dementia". The deep down crazies, the wet willies, the screaming moist..."
- Xavier: Renegade Angel has a variant. (SAAAAAAAND MADNESS!)
- Referenced in Road To El Dorado after Miguel, Tulio, and their horse Al Tivo have been floating for God-knows how long and then suddenly wash ashore:
Miguel: And it is! It really is the map to El Dorado! *he pants with excitement*
Tulio: ...you drank the seawater, didn't you?
- As quoted, the episode "How the West was Fun" of Flapjack. The full sequence is mildly horrifying.
- One of the most infamous examples is the claim that sailors in previous centuries thought they had seen mermaids while at sea. It's generally assumed that they actually just saw manatees who feed their young in a manner that resembles a human female breastfeeding her baby. Still, you have to pretty insane to confuse a Manatee with a human female.
- Well, that or... ahem... very desperate.
- Though Columbus wrote in his log "I have seen the mermaids, and they are not so beautiful as tales tell."