[[quoteright:329:[[ComicBook/DisneyDucksComicUniverse http://static.tvtropes.org/pmwiki/pub/images/DonaldMine.jpg]]]]
[[caption-width-right:329:[[FishingForSole Much more impressive than a boot.]]]]

->''Any ship can be a minesweeper. [[GallowsHumor Once.]]''

Ah, [[NavalWeapons naval mines.]] Just the thing to catch [[TypesOfNavalShips unwary vessels.]]

The use of these NavalWeapons is still legal [[LandMineGoesClick unlike the anti-personnel land-based version]], but you are required to notify people of their use and the rough location of them, so civilian shipping can stay out of the way.

Naval mines in fiction are always portrayed as large metal spheres covered with small spike-like detonators which cause the mine to explode on contact with a ship (or any unfortunate individual). This is based on the appearance of early (World War I-era) naval mines. Most modern ones look rather different. Some are self-contained launch tubes for a [[http://en.wikipedia.org/wiki/CAPTOR_mine homing torpedo]] that launches when it detects the sound of a ship or submarine's propellers (and is smart enough to distinguish between the two, or even different classes and sizes of ship, and may be set to attack either or both). Others are [[AirLaunchedWeapons modified aircraft bombs]] dropped in shallow waters to lie on the sea bed, with sensor circuitry that detonates when they detect the change in magnetic fields created by the ship's metal hull. The horned type, however, remains a favored weapon for shallow waters and low budgets, and like the CartoonBomb is easily recognized by the viewing public.

That page picture has a grain of TruthInTelevision to it, by the way; fishing trawlers working in the English Channel or the North Sea really do pull unexploded mines, torpedoes and other Second World War-era munitions out of the depths [[OhCrap every so often]].
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!!Examples:

[[foldercontrol]]

[[folder:Anime]]
* The [[Anime/DigimonXrosWars Digimon]] Chikurimon is one.
* ''Anime/MazingerZ'': In episode 22, [[TheDragon Baron Ashura]] used electric sea mines -called Balanger M1-. They were light blue with dark blue spikes that covered its bodies, and they were able to move through water and home in on an opponent. Once they came into contact, they released electric charges to hurt their target. [[MonsterOfTheWeek That episode also featured]] [[{{Robeast}} Mechanical Beast]] Balanger M2, a [[TransformingMecha giant robot capable to transform]] into a red, spiky, electric sea mine.
* ''Anime/RurouniKenshin'': In the last manga arc, [[SmugSnake Heishin]] used sea mines to protect his organization's [[IslandBase base]]. They looked like the classic type and they were stored inside wooden cages.
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[[folder:Film]]
* At the beginning of ''Film/ForYourEyesOnly'', a British spy trawler accidentally fishes in a sea mine and sinks. It seems like a freak accident, but it was actually planted by TheDragon, who later blows up another on dry land to effect his escape from 007.
** In ''Film/{{Moonraker}},'' Bond's [[CoolBoat Amazon boat]] has a number of these in its arsenal, which Bond releases to blow up a pursuing boat.
* ''WesternAnimation/FindingNemo''
** Those would have had to be Allied ASW (Anti-Submarine Warfare) mines as the Japanese would not have been able to lay mines and the Allies had no motive to lay any other type. By an example of HollywoodTactics the submarine seems to have been an Allied sub. While of course mines wouldn't know the difference, Allied subs would not be submerged near Australia. They would be running on the surface, with an escort to prevent friendly fire, too high to be hit by ASW mines.
* ''HotFuzz'', except it's not underwater when we see it, it's ''lying around in some dude's garage''.
** Though initially appearing to be a dud, it quickly starts ticking once Angel and Danny find it. [[spoiler:DoubleSubversion; it doesn't go off, and it ends up stored in the evidence locker with Angel believing it's deactivated. It winds up [[ChekhovsGun going off]] in the penultimate scene]].
* ''The Heroes of Telemark'' have to fend off a mine with a big pole while escaping from Norway.
* The protagonists of ''Film/TheCityOfLostChildren'' have to navigate through a bunch of these to get to the lair of the resident MadScientist.
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[[folder:Live Action TV]]
* The 1970's Australian series "Patrol Boat" had an episode where a Japanese WW2 sea mine had drifted inshore, but blowing it up would mean destroying some historical Aborginal cave paintings. Forget how it was resolved.
* One of these washed up in the lagoon in an episode of ''GilligansIsland''.
* Done in the first series of ''SeaPatrol'', when a mine washes up on a beach after a cyclone. While it is unstable, the only real danger comes from a pair of TooDumbToLive preteen boys who find the mine, don't report it straightaway. One even runs towards it when the bomb disposal unit are about to destroy it to save a tortoise.
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[[folder:Other]]
* Naval mines were used in the 1998 MBX ''The Battle of Brunei''. The Malaysian naval commander gave the RefugeInAudacity order that the minefields be regularly [[http://en.wikipedia.org/wiki/Chumming chummed]].
* Dutch comedy Audio series Ome Henk has the titular Uncle Henk berate his Director for misinforming his nephew Jantje for calling a Seamine a Buoy. His nephew responds by [[StuffBlowingUp throwing it away, causing a GINOOOOOOOORMOUS explosion]]. [[RunningGag As per usual.]]
* It's widely accepted that a Navy Mine sunk the Hospital Ship The ''HMHS Britannic.'' The 2000 Made for TV Movie however played with the alternate theory of a submarine torpedo but in the end it was the work of a [[VehicularSabotage saboteur]].
* Common in the old ''Magazine/{{MAD}}'' magazine standby, ''ComicStrip/SpyVsSpy''. Sometimes they were hidden in innocent-looking items as a trap, other times they were [[HoistByHisOwnPetard turned on their owners]], but it was as good as guaranteed that seeing one in the setup would result in an explosion by strip's end.
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[[folder:Radio]]
* ''TheGoonShow'': "The Dreaded Batter Pudding Hurler".
-->'''Eccles:''' MINE AHEAD! Dirty big mine ahead!
-->'''[[DirtyCoward Bloodnok]]:''' Mi—? ''(footsteps running into the distance, splash)''
-->'''Neddie Seagoon:''' Funny, he wasn't dressed for swimming.
-->'''[[TooDumbToLive Eccles]]:''' Wait, fellas, there's no need to worry about the mine — it's one of ours!
-->''(KABOOM)''
[[/folder]]

[[folder:Tabletop Games]]
* ''BattleTech'' allows for the deployment and use of minefields as part of its advanced (i.e., not strictly tournament-standard) rules. This includes explicitly sea-based conventional, inferno, or command-detonated minefields; inferno mines only work on the surface, the other two can be placed at any given depth.
* Widely used in ''TabletopGame/{{Harpoon}}''.
* ''TabletopGame/{{Space 1889}}'' the adventure Canal Priests of Mars have an aerial version.
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[[folder:Video Games]]
* Can be deployed in ''{{Harpoon}}''.
* ''VideoGame/InTheHunt'' has ''loads'' of these in the first stage and the final stage.
* In ''SteelSaviour'', the first MiniBoss drops these near you, which explode in a large SphereOfDestruction.
* The {{Pokemon}} Koffing's appearance is based on a floating naval mine. Since it learns [[TakingYouWithMe Self-Destruct and Explosion]], this is fitting.
* ''VideoGame/Sly3HonorAmongThieves'' features these as a hazard in some stages, as smallish items (often with their own inner tubes for flotation). The last chapter notes your approach to magnetic mines in a ship. [[spoiler:The Cooper Gang avoided CriticalResearchFailure and CriticalExistenceFailure by bringing the ship from the prior chapter. Made primarily of wood.]]
* Relic Entertainment's VanityPlate shows one of these.
* ''VideoGame/{{Crysis}}'' had them for some reason.
* Appeared in one mission in ''VideoGame/GrandTheftAutoChinatownWars''.
* You can find them scattered on a dry lakebed in ''VideoGame/{{Borderlands}}: The Secret Armory of General Knoxx''. If you drive a car too close, they will explode and kill you.
* Common obstacles in the first two ''Franchise/CrashBandicoot'' sequels.
* 2/3 of the underwater stages in ''VideoGame/{{Alundra 2}}'' feature these.
* The SNES platformer ''Claymates'' had a few of these floating around some of the longer underwater sections.
* ''VideoGame/DukeNukem3D'' features small mines in the "Toxic Dump" level.
* ''Sub Culture'' had whole fields of this, sometimes made extremely dense for some missions.
* The player's ship has to navigate minefields every now and then in the ''NavalOps'' series. You can also lay mines, but they don't do very much damage and getting another ship to run into them is iffy at best.
* There were a few in the Pirate's Fortress in ''VideoGame/TheLegendOfZeldaMajorasMask''.
** ''PhantomHourglass'' has underwater enemies during the treasure-salvage minigames that evoke this look, being one-eyed spiked balls that explode if you get too close to them.
* KingdomOfLoathing has mine crabs, hermit crabs that claimed naval mines as their homes. See DemonicSpiders.
* ''VideoGame/{{Bug}}!'' had these in [[UnderTheSea Quaria]]. They blew up if you touched them, of course.
* Featured in the seventh story mission of ''JawsUnleashed''. Just touching the chains which they're attached to would make them explode.
* The first Venice level in ''Franchise/TombRaider II'' has a group of sea mines in by the level exit. Naturally, you couldn't drive your boat through the area unless you wanted to suicide but the trick to clearing the mines is to accelerate to the mines and jump out of the boat before impact.
* In ''[[{{Banjo-Kazooie}} Banjo-Tooie]]'', the Submarine Challenge minigame involves destroying a bunch of these (called Shrapnel) for points.
* Lots of them show up in ''VideoGame/GoldenEyeRogueAgent'' in a cutscene when you arrive at Crab Key.
* Shows up in the game ''VideoGame/SuperMarioWorld''.
* ''VideoGame/AdvancedStrategicCommand'' has anti-ship and anti-sub mines. Standard unitsets include minelaying-capable submarines, among other things.
* ''VideoGame/MegaMan4'' has some stationary underwater ones that explode when you linger near them in Dive Man's level.
** ''VideoGame/MegaMan9'' has ones that look normal enough at a first glance, but when neared or shot at, [[ActionBomb they'll reveal their faces and chase you around briefly before exploding]].
* Certain environments had these in ''VideoGame/{{Carmageddon}}''. Interestingly enough, they frequently appeared above water as well, still floating while chained to the ground. If run into, the whole sprite would explode and deal dynamic but even damage to the recipient's vehicle based on his/her innate strength and armor level.
* A rare appearance of the "torpedo launch tube" type of modern sea mine is the Widow mine in ''{{Starcraft}} 2'', which burrows into the ground and periodically launches a single homing rocket.
* In keeping with the game's goofy, nonsensical 1960s setting, ''VideoGame/TeamFortress2'' features the [[http://wiki.teamfortress.com/wiki/Sentry_Buster Sentry Buster]] robot enemy in Mann Vs. Machine mode. It is half robot Demoman, half sea mine, and all ActionBomb.
* Chapter 4 of ''VideoGame/GatlingGears'' has these with a twist: TheEmpire has drained the entire sea, turning it into a desert, so the mines are stuck in the ground like landmines. There's also an achievement for not getting damaged by any of these.
* The ''{{Commandos}}'' series, particularly ''Men Of Courage'', has them. The Diver has to disarm them in at least one mission.
* Somewhat ironically, sea mines end up as land mines in ''VideoGame/MechWarrior 3'', where you were tasked with infiltrating a former lake for one mission. The heavy sea mines that had been placed there to ward off a naval attack did not escape the lake when it drained and dried up, and instead sank into the sediment on the bottom, becoming a hazard to any large, passing pieces of metal, such as your HumongousMecha. This obligates you have a sense for careful navigation, a watchful eye, and an equally steady hand to locate and destroy the mines with neither radar alerts nor targeting assistance.
[[/folder]]

[[folder:Webcomics]]
* ''{{Newshounds}}'' featured a dolphin whose former job was to find these. He wasn't very good at it. Favourite line: 'Boom boom boom go the ocean zits!'
[[/folder]]

[[folder:Western Animation]]
* On ''WesternAnimation/{{Centurions}}'', Max Ray's Depth Charger weapon system was equipped with one called a "hydromine". He once used several of them to stop a tsunami from occurring when a massive meteorite landed in the ocean.
* The unfortunately-named "Stink 'n' sink" mines from ''WesternAnimation/AvatarTheLastAirbender,'' invented by Hakoda.
* On the ''WesternAnimation/LooneyTunes'' short "Porky's Snooze Reel", a jellyfish swallows a mine whole, despite the narrator's warnings, and is blown into jars of Jell-O.
[[/folder]]

[[folder:RealLife]]
* Maritime mine warfare is actually OlderThanTheyThink: the concept was first introduced in the Ming dynasty China in the 14th century, and used against Japanese pirates (Wako) in the 16th century.
* Mines are a menace at shallow and narrow seas. Consequently, littoral countries with vast archipelago or shallow coasts are experts on mine warfare. Examples contain Finland, Greece, Germany, Thailand and Poland. Conversely, they are of little use on depths more than 200 m.
* Finland literally bagged the Soviet Baltic Fleet at Kronstadt harbour in 1941 by mining the whole Gulf of Finland. The minefields contained mines on different depth so that not even submarines could get out. After the Armistice 1944, openings were cleared on the minefields so that the Soviet ships could freely enter and exit the Baltic. The minesweeping continued well into the 1950s.
* The spiky protrusions on the mine which Donald and the Ducklings have just angled on the cartoon featured are so-called Hertz horns. They are lead horns which contain a small glass ampulla full of electrolyte and two electrodes. When a ship runs into the mine, the soft lead of the horn will bend, breaking the ampulla and letting the electrolyte run in the horn. It will then close an electric circuit, which then in turn will detonate the fuse and the explosive charge on the mine itself.
* Sea Mines, like their land-based cousins, could serve as more of a deterrent than a direct weapon. Enemy ships had to sail around known minefields, thus a force could mine waters on the most direct route between an enemy base and their own waterways. Such a tactic was used during WorldWarOne to try and limit the effectiveness of German U-Boats by forcing them to take a longer route to get at Allied shipping. This tactic could be combined with shallow-draught wooden-hulled sub-hunting speedboats that could cut across the minefields, attack the German U-Boats, then flee back across the minefields to safety.
* Due to an interesting evolution of design, sea mines are also the ancestors of the modern Torpedo, with the original torpedoes being sea mines named for a type of electric ray which [[MeaningfulName would sting you if you came too close.]] Later tactics developed with boats dragging torpedoes in the path of enemy ships, then later the relatively safer method of sticking the torpedo on the end of a spar and ''ramming'' an enemy ship with it (using the towing tactic, the tow lines sometimes got wrapped up in the screw of the boat, [[HoistByTheirOwnPetard dragging the torpedo in]]). Eventually someone got the bright idea of just attaching an engine to the torpedo and letting the boat stay out of the blast radius.
[[/folder]]
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