No Bananas, No Whistling, No Problem: 10 Nautical Superstitions That Refused to Die

Spend enough time around boats and you eventually learn the sea has its own code of conduct, and none of it was reviewed by lawyers, the random safety officers, or frankly any rational adult. Some rules make sense. Some came from hard-earned experience. And some sound like they were handed down by a weather-beaten old deckhand who saw one bad day on the water in 1978 and has treated it as official doctrine ever since. I was out sport fishing recently and heard one I had somehow missed after all my years in and around the Navy: never bring bananas on a fishing boat. Not a banana. Not banana bread. Not banana chips. Not even Banana-boat sunscreen! That sent me down the rabbit hole of nautical superstitions, and once you start looking, you discover that Sailors have spent centuries building an entire side religion out of bad omens, rituals, curses, and deeply suspicious produce. Maritime historians note that superstition flourished at sea because seafaring was dangerous, isolated, and often wildly unpredictable. 

And frankly, who can blame them? For most of human history, going to sea meant climbing aboard a floating bundle of wood, rope, canvas, iron, bad food, worse weather, and just enough navigational confidence to get yourself into serious trouble. Long before radar, satellites, and modern forecasting, Sailors worked in an environment where the ocean could punish overconfidence, carelessness, and plain bad luck with very little warning and absolutely no apology. In a world like that, people start noticing patterns. They start assigning meaning to birds, weather, names, dates, animals, and fruit. And once enough generations do that, superstition stops being a quirk and starts becoming part of the culture of the sea itself.

1. Bananas are cursed

Let’s begin with the fruit that apparently offended the entire maritime world, and got me started on this journey. In fishing culture especially, bananas are not merely considered unlucky. They are treated like a full-blown floating curse. Show up to a serious fishing boat with a banana in your bag and you may as well have boarded carrying a hex, a broken mirror, and a handwritten request for engine trouble. If the fish stop biting, if a line snaps, if the weather turns, if somebody trips, if the cooler stays empty, or if the whole day goes sideways in any way at all, the banana is getting blamed. That is the superstition in its purest form: bananas are cursed because bananas are cursed, and nobody aboard is interested in your scholarly counterargument. Maritime folklore sources consistently list bananas as one of the best-known bad-luck items at sea, especially on fishing boats. 

Now, historically, the exact reason this superstition took hold is not settled. I cannot confirm a single clean origin story, and the best maritime sources do not pretend there is one. Instead, they usually point to a cluster of possible explanations: banana cargo spoiled quickly and forced faster voyages; banana bunches and crates could hide spiders or snakes; and ripening bananas give off ethylene gas, which can speed the spoilage of nearby produce. All of that is plausible. All of that may have helped the legend along. But none of it changes the operational truth on the water: in the minds of a great many fishermen, bananas are cursed, they have always been cursed, and the person who brings one aboard owns every bad thing that happens afterward.  And I still don't see any connection between spoiling bananas and fishing. But whatever... No Bananas Aye!

2. Never whistle on deck unless you want weather

Whistling on land is one thing. Whistling on a boat is another matter entirely. For generations, Sailors believed that whistling could stir up the wind, summon a storm, or at the very least irritate powers better left unprovoked. In some traditions, a whistle might coax a breeze in calm weather. In others, it was practically an invitation for the sky to start throwing punches. Either way, it was not treated like harmless background noise. It was treated like messing with systems you did not control, which is a sentence that has historically ended badly in both seamanship and life in general. Maritime superstition sources repeatedly describe whistling as something that could “whistle up” the wind or a storm.

And honestly, that feels believable on a gut level even if you strip away the folklore. The sea already has enough attitude that demands respect without some overconfident fool on deck deciding to conduct the atmosphere with his lips. Old Sailors understood a principle that still holds up: not everything needs your input. You do not taunt the weather, you do not poke a bad situation just to see what happens, and you do not assume nature is in the mood for your little experiment. Sometimes the smartest thing a Sailor can do is the same thing a smart Sailor has always done: shut up, do the job, and do not go looking for trouble when trouble already knows exactly where you are. 

3. Renaming a ship is asking for trouble

This is one of the great classics because it still makes boat owners twitch. The superstition says it is bad luck to rename a ship because the sea already knows her by the name she carries. In one long-standing version of the story, Poseidon keeps a ledger of every vessel at sea, and changing the name without the proper ceremony is less of an administrative update and more of a direct challenge to the god running the water. Maritime museums note that to avoid bad luck, the original name was supposed to be formally purged in a de-naming ceremony before a new one was adopted. In other words, this was not just repainting a transom. This was spiritual paperwork with consequences.

And frankly, I respect this one because it feels exactly like the sort of sea-law that would emerge from centuries of hard experience and quiet dread. A ship is not just a machine. She has a history, a personality, a reputation, and often a very long memory. Sailors trusted their lives to named hulls. They fought in them, crossed oceans in them, and depended on them when nothing but deep water lay in every direction. So no, you do not casually scrape off Sea Mistress and repaint Weekend Tax Shelter on the stern like you are renaming a fantasy football team. That kind of disrespect toward tradition feels like the precise sort of arrogance the ocean enjoys correcting.

4. Friday was a bad day to sail

Here's one I didn't know until I went down this rabbit hole. Sailors did not just worry about what was aboard. They also worried about when they left. Friday was widely considered an unlucky day to begin a voyage, and Thursday often got dragged into the same category. The New Zealand Maritime Museum notes that Thursday could be seen as unlucky because it was Thor’s day, while Friday was viewed as unlucky because it was the day Jesus was executed. Other dates also made the blacklist in some traditions, because once mariners start building a superstition calendar, apparently there is no reason to stop at one or two cursed squares.

From a modern perspective, refusing to get underway on a Friday and missing the weekend makes complete sense to me.  Because why not spend one more weekend in port and get underway on Monday.  But in the old maritime world, when voyages meant real exposure to storms, disease, war, shipwreck, and plain rotten luck, starting on a bad day did not seem silly at all. It seemed prudent. If your crew already had enough to worry about, why knowingly stack one more layer of bad luck on top of the whole enterprise? There is a certain grim old-school logic to that. Superstitious logic, yes. But still logic. 

5. Put a coin under the mast and maybe the sea leaves you alone

Old Sailors were not content to merely avoid bad luck. They also liked to stash a little good luck aboard before heading out into the great watery unknown. One of the best examples is the old tradition of placing a coin under the mast of a ship. The USS Constitution Museum explains that Sailors believed a coin under the mast could bring good luck or a profitable voyage. But because maritime superstition never misses a chance to get dark, the tradition also carried a more grim meaning: if the ship were lost and the crew went down with her, the coin would cover their fare into the afterlife. That belief echoed the older classical idea of paying the ferryman of the dead, which is a hell of a thing to build into your ship from day one, but it does show the crew was planning ahead.

And honestly, this one has a kind of hard-earned dignity to it. A Sailor looks at the ocean, looks at the odds, and says, “Fine. We’ll take every advantage available. Seamanship, courage, training, and one strategically placed coin for whatever supernatural paperwork may be required later.” NAVSEA notes that coins are still typically placed under or near the mast in modern mast-stepping ceremonies, which means this bit of old maritime folklore survived long past the age of sail. So while some superstitions feel like dockside nonsense that got out of hand, this one feels different. This one feels like Sailors staring out at an indifferent ocean and deciding that if fate wanted a toll, they would at least be ready to pay it.

6. Beware the Jonah

No crew wanted a Jonah aboard. The term comes from the biblical Jonah, and at sea it became a label for a person thought to bring bad luck to the vessel. Maritime superstition sources note that people tagged as Jonahs could include priests, clergymen, and redheads, depending on the local tradition. In some versions, if you encountered a redhead before boarding, the bad luck could supposedly be avoided only if you spoke first. That is objectively unfair, deeply irrational, and perfectly on brand for ancient maritime thinking.

This belief says a lot about human nature. When things go wrong, people want a reason. They want a cause. They want something they can point at besides the terrifying truth that sometimes the sea just decides to hand out misery and there is no larger lesson in it. So instead of blaming weather, poor seamanship, rotten rigging, or plain rotten luck, somebody looked for a Jonah. Somebody to pin it on. Suddenly the problem was not the gale, the chart, or the command decision. The problem was Frank, and Frank happened to board with red hair and bad timing. It was ridiculous, unjust, and also a very human attempt to make chaos feel explainable.

7. Never kill an albatross

Among maritime omens, the albatross sits in rare company. Sailors long regarded these great seabirds with awe, and Britannica notes that seamen once believed killing an albatross brought bad luck, a superstition immortalized in Coleridge’s The Rime of the Ancient Mariner. Maritime folklore also connected albatrosses with the souls of dead Sailors or with powerful omens over the open sea. Whether taken as guardians, ghost-birds, or simply creatures too uncanny to offend, they were not something wise mariners wanted to mess with.

And really, even without the curse, killing one feels like a terrible idea. Here is this enormous ocean bird gliding over the water like it owns the weather, minding its own business, looking every bit like a messenger from some older and stranger version of the sea—and someone decided the smart move was to shoot it? Of course that story ended badly. Makes me kind of wondering why this even needs to be said.  Who would ever shoot this magnificent creature.  But by the fact that this is a superstition, someone at some point in time decided that was a good idea...it wasn't.  If the ocean sends you a giant ghost-bird with a wingspan wider than your plans, maybe you should just leave it alone. Some lessons should not require poetry, but apparently this one did. 

8. A ship’s cat was worth having aboard

Not every superstition at sea was gloomy. Some were practical enough to earn their keep. Cats were welcomed aboard ships because they killed rats and mice, protected provisions, and helped keep the vessel from turning into a floating rodent uprising. Royal Museums Greenwich notes that seamen often kept cats and dogs as pets or ship’s mascots, and the U.S. Naval Institute notes that superstitious Sailors also believed cats brought good luck or even offered protection in bad weather. In other words, the ship’s cat occupied a rare and honorable position at the intersection of folklore, morale, and pest control.

This is one of the few sea traditions where superstition and common sense are standing the same watch. Even if you strip away all the folklore, the cat still earned its passage. It had a job. It contributed to the mission. It protected food stores and general sanity. And unlike a cursed banana, which apparently brings doom without ever once helping with vermin control, the cat brought real value aboard. There is something deeply satisfying about that. A good ship’s cat was part mascot, part mouser, part morale officer, and probably more useful than at least one member of the crew.

9. Pig and rooster tattoos were supposed to bring you home

This one sounds ridiculous right up until you hear the logic, and then it becomes maritime ridiculousness of a very respectable vintage. Sailors sometimes tattooed a pig on one foot and a rooster on the other because they believed those images would help keep them from drowning or guide them safely ashore if they went overboard. The New Zealand Maritime Museum says these tattoos were believed to prevent drowning or show Sailors the way to shore, and the museum’s tattoo history page describes the pig-and-rooster pairing as talismanic ink meant to ward off drowning.

You have to admire the mindset here. It is half talisman, half gallows humor, and fully Sailor. It says, “Yes, the sea may try to take me, but I have taken steps.” Granted, those steps involve farm animals and tattoo needles, but still—steps were taken. It reflects something old mariners understood in their bones: even when the odds were bad, you looked for some edge, some charm, some symbolic scrap of hope you could carry with you. Sometimes that hope came in the form of training and skill. Sometimes it came in the form of a rooster on your foot. The sea has seen both.

10. St. Elmo’s fire meant the sea was talking

Few things at sea look more supernatural than blue or violet light dancing on a mast in the middle of bad weather. NOAA explains that St. Elmo’s fire is a colorful discharge of atmospheric electricity that can appear on sharp objects such as a ship’s mast during a thunderstorm, and that “St. Elmo” is derived from St. Erasmus of Formia, one of the patron saints of Sailors. Before the science was understood, though, that eerie glow sat right on the border between terror and comfort. Some mariners saw it as a warning of violent weather or lightning. Others took it as a sign of protection. Either way, nobody looked at ghostly fire on the mast and shrugged it off.

And that is exactly why the phenomenon endured in maritime lore. It looked alive. It looked purposeful. It appeared in the kind of weather that already had everybody on edge and very aware that nature had the upper hand. You cannot tell a crew of tired, wet, weather-beaten Sailors standing under a hostile sky that luminous fire on the mast means nothing. They are going to give it meaning. They are going to tell stories about it afterward. They are going to remember how it looked, how the sea was running, how the mast hummed, and who was still around to talk about it later. That is how superstition survives—not because it is foolish, but because it gives shape to fear.

Closing

It is easy to laugh at nautical superstitions, and we should, because some of them are flat-out ridiculous. A cursed banana. Dangerous whistling. A bad weekday. A coin for the ferryman built into the ship. A rooster and a pig as an anti-drowning strategy. This is not exactly a peer-reviewed science journal. But underneath the humor sits something real. These beliefs grew out of the hard truth that Sailors spent centuries working in one of the most dangerous environments on earth. Superstition became part coping mechanism, part ritual, part crew culture, and part attempt to impose some kind of order on a world that often offered none. The sea was bigger than the ship, bigger than the crew, and certainly bigger than anyone’s confidence.

So the next time somebody tells you to leave the bananas ashore, do not argue. Do not launch into a lecture on cargo spoilage and ethylene gas like you are giving a brief to the wardroom. Do not insist you are a rational modern adult who stands above folklore. Just set the banana down and back away like a professional. Because on the water, tradition still matters, luck still matters, and nobody wants to be remembered as the idiot who brought cursed fruit aboard and then wondered why the whole day went straight to hell.

Share your sea story with us. If you ever served on a ship with its own weird rituals, taboos, omens, or old-Sailor rules that nobody dared ignore, we want to hear about it. Better yet, send a photo too. Submit your story at oldsaltcoffee.com/pages/sea-story-submissions and let’s keep the sea stories coming.

Sources:

National Maritime Museum Cornwall, “Maritime Superstitions.”
New Zealand Maritime Museum, “Top 20 Sailing Superstitions.”
NOAA National Ocean Service, “Weird Ocean Phenomena.”
USS Constitution Museum, “Hidden Treasures” and “Sailor’s Superstitions.”
Britannica, “Albatross.”
Royal Museums Greenwich, “Animals at Sea.”
U.S. Naval Institute, “Cats in the Sea Services.”