%% Image kept on page per Image Pickin' thread: http://tvtropes.org/pmwiki/posts.php?discussion=1308675959081900100
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[[quoteright:245:[[ComicBook/ThePiper http://static.tvtropes.org/pmwiki/pub/images/dark_pied_piper.jpg]]]]
[-[[caption-width-right:245:It [[JustForPun sucks]] to be on the [[JustForPun tail end]] of this.]]-]

->'''Mariana:''' Don't pee in the water.\\
'''Beck:''' Why?\\
'''Mariana:''' A candiru, a vicious parasite will swim up the urine into your ''pau''.\\
'''Beck:''' Swim up my what?\\
'''Mariana:''' Your pinto. It'll swim up your ding-dong. And once it gets in, you can't get it out.\\
'''Beck:''' ''(stammers)'' Well, then what?\\
'''Mariana:''' They have to amputate.\\
'''Beck:''' ''(closing his pants really tight)'' Not this boy's pinto. Uh-uh. Not today!
-->-- ''[[Film/TheRundown The Rundown / Welcome to the Jungle]]''

A variation of BodyHorror, where a creature basically forces ''all of'' itself into someone else, but through an established opening of the body (as in naturally, not a cut or piercing), even if it's not really an opening ([[Film/TheMatrix like the navel]]). It could be the mouth (do not confuse with ForceFeeding, but it can overlap with AttackTheMouth), the nostrils, the ear, or through orifices below the belt. Pores could even count.

Effects on the victim can range from [[PuppeteerParasite mind control]] to [[BodyHorror transformation]], and even death.

Can be very strong NightmareFuel due to this being a pretty potent PrimalFear, even and especially when it's used in some really odd {{Hentai}} (remember RuleThirtyFour, boys and girls). Still, do not read the examples unless you want to be really {{squick}}ed.

Sometimes an orifice evacuation implies that is how it came in, even if that isn't stated.

Compare PersonalSpaceInvader, FaceFullOfAlienWingWong, AnalProbing, AssShove, NoseShove.

Contrast OrificeEvacuation (where something leaves a body through an orifice), ChestBurster.

Not to be confused with AlienInvasion (although these can overlap).



[[folder:Anime & Manga]]
* In ''Manga/DragonBallZ'', one of the first acts Super Buu commits after being formed is to turn entirely into pink goo, force himself down the throat of one of the humans that shot Fat Buu's dog and expand, blowing the guy apart from the inside.
** Later tried again against [[FusionDance Vegito]], who responded by beating the crap out of Buu ''from the outside''.
* In ''Anime/DragonBallGT'', Baby possesses Vegeta while he's powering up by reverting to his liquid metal state and enters his body through his pores.
* This is how the larval form of the entities in ''Manga/{{Parasyte}}'' take control of their hosts, usually entering through the ear of a sleeping person to get at the brain. When the protagonist fell asleep with headphones on, his symbiote tried getting in through one of his nostrils instead. After he woke up, it had to settle for burrowing into his arm. He tied his headphone wires tight around his arm to keep it from burrowing up to his head before it went in place, screwing up the transformation process so he and it are SharingABody instead of it taking over completely.
* ''Manga/GetterRobo'' has the Invaders, a race of [[CosmicHorror cosmic horrors]] who can invade people's bodies if they so much as ''bleed'' on them. Though most of the time they prefer to just dive into people's throats, or simply rip a hole in their torso and use that.
* Medusa in ''Manga/SoulEater'' possesses an innocent girl in the suburbs this way, by turning into a snake and slithering into her mouth.
** And before she did it to the girl, she did it to a dog.
** She also does this with the snakes she controls instead of herself: if she can get something into an entry point to your body she can send in hundreds of snakes which let her track you wherever you are and can rip you to pieces whenever she tells them to.
* Happens too many times to count in ''Manga/JojosBizarreAdventure''.
* In the manga version of ''Film/{{Juon}}'', this is how Kanna meets her end when a bunch of possessed cats enter her mouth [[spoiler:and [[{{Jawbreaker}} tear her jaw off]]]].
* In the DVD remake of one episode of ''LightNovel/{{Bakemonogatari}}'', an invisible snake-like oddity tries to force its way down [[spoiler: Nadeko's]] throat.
* In ''Manga/{{Basilisk}}'', one of the ninjas from the Iga clan whose power is to turn into a slug-like thing in the contact with salt kill a ninja from the Kouga clan by jumping in his mouth, inside his throat and breaking his neck.
* Done constantly to poor Sakura in ''LightNovel/FateZero'' (with a pit full of worms) by her stepfather.
** Same for her uncle Kariya, who is also quite "intimate" with the aforementioned worms. The scene where he had a [[DoesThisRemindYouofAnything remarkably phallic worm forced down his throat]] was probably the most graphic OrificeInvasion of the series.
* ''Manga/TokyoGhoul'': During Kaneki's ten-day period of captivity at the hands of [[TortureTechnician Yamori]], one of the various [[ColdBloodedTorture tortures]] Yamori inflicts on him is stuffing a live centipede in his ear. After breaking free from his restraints and beating Yamori into submission, Kaneki stops just long enough to pull said centipede out.

* The Franchise/DCUniverse ''ComicBook/FiftyTwo'' series answers a question no one ever asked before: can [[spoiler:OrificeInvasion of a ''robot'']] be made to look horrific? The answer? Dear Nicolas Cage, yes.
* In ''ComicStrip/CalvinAndHobbes'', one of Calvin's [[ImagineSpot fantasy sequences]] involves a frog forcing its way into his mouth and being swallowed. Which leads to the punchline: [[spoiler:he had a frog in his throat.]]
* The image example for this trope comes from ''The Piper #2'' by Zenescope comics. The woman in question ([[TheBrute Sandra]]) just had a poisonous snake slide into her mouth after putting her lips on a french horn's mouthpiece, [[spoiler:all thanks to the Piper playing his lethal song outside her room [[DealWithTheDevil in behalf of Sean]] due to her [[NoHoldsBarredBeatdown beating the crap out of Sean]] for her buddies over him having recorded a tape, then getting away with it. [[AssholeVictim She dies]].]]
* A (relatively) innocent example [[http://ps238.nodwick.com/comic/05302011/ happens in]] ''ComicBook/PS238'' when [[RubberMan Polly Mer]] tries to stop a metahuman with SuperStrength and MakeMeWannaShout powers by wrapping herself around his head. Unfortunately his inhaling abilities are a bit stronger than expected. Polly states afterwards it's the [[{{Squick}} first time she's felt what lungs feel like.]]
* Averted in ''ComicBook/HackSlash''. A fetal Slasher with a knife attempts to crawl into Cassie Hack's vagina while she's at the ''gynecologist's office''. Cassie, of course, takes exception to this.
* In [[ComicBook/MarvelZombies Marvel Zombies Return]] the Zombie heroes are transported to a parallel universe similar to theirs before the plague. While searching for a cure, Zombie!Spider-Man runs into the Sinister Six, who confuse him for their version of the hero. They are extremely and understandably shocked when Zombie!Spidey gives in to his hunger and starts killing and eating them. Since his sand-like body cannot feed him, he leaves Sandman alive, who escapes. Later, he runs into his universe's Spider-Man, who, unaware of the situation, jokes around normally. Not realizing there are two Spideys, this sends Sandman into a fit of rage, reasoning that Spider-Man clearly no longer cares and rather than be converted into food he decides to kill the hero, by forcing himself into Spidey's mouth and exploding his body from inside in a rather gruesome (if bloodless) manner.

[[folder:Fan Works]]
* In the MagicalGirl CrisisCrossover ''FanFic/ShatteredSkies'', [[spoiler:[[SlimeGirl Jamanen]] from ''Franchise/SailorMoon'' appears with a vastly upgraded power set. In a ShoutOut to the infamous Inque scene from ''[[WesternAnimation/BatmanBeyond Batman Beyond]]'' below, she forces herself down [[Anime/HappinessChargePrettyCure Cure Fortune's]] throat and floods her body... [[FateWorseThanDeath but this doesn't kill her]]. [[TheAssimilator The process assimilates Fortune's body into a "drone" under Jamanen's control]], after which she forces her new servant to beat [[Anime/FutariWaPrettyCure Cure Black]] to a pulp while she's [[AndIMustScream helpless to do anything but watch]].]]

* Played for laughs in ''Film/ArmyOfDarkness'' when one of Ash's miniature clones dives into his mouth. He retaliates by drinking boiling hot water.
* The monster in ''Film/BabyBlood'' enters a woman through her vaginal canal.
* Used with a snake in ''Films/CollateralDamage'' by the BigBad, to execute a spy.
* The fly that enters the nose of the main characters ''Film/DragMeToHell''.
* ''Film/TheHidden'': The alien parasite burrows into and out of mouths several times during the movie. One scene used a prosthetic head to show the process in gory detail; upon seeing that scene on film, the actor whose likeness was on the head was physically ill.
* During the interrogation scene from ''Film/TheMatrix'', Agent Smith and his men put a "bug" into Neo, a horrible creature that enters through his belly button. It is exactly as terrifying as it sounds, especially since they had also [[WipeThatSmileOffYourFace fused his mouth shut]] in response to him demanding his phone call.
* A monster in ''Film/PoltergeistIITheOtherSide'' disguised itself as a tequila worm to take over the dad. However, the dad overcame this and threw it up.
* The Decepticon Doctor (Scapel) in ''Film/TransformersRevengeOfTheFallen'' reads Sam's brain by sending a small robot up his nose.
* The slugs in ''Film/NightOfTheCreeps''.
* The slugs in the movie ''Film/{{Slither}}'' enter their hosts through their mouths.
* In ''Film/{{Sniper}}'', Thomas Beckett (Creator/TomBerenger) warns his partner not to urinate as they are wading through a waist-deep river, because small organisms will enter his urethra and dig in with spikes.
* ''Film/StarshipTroopers2HeroOfTheFederation'', the [[BMovie low-budget sequel]] to the first movie, introduced a breed of bugs that entered through the mouth to control the humans (it was also a convenient way to save on the special effects).
* The larval Ceti eels in ''Film/StarTrekIITheWrathOfKhan'' enter through the ear.
** The Centaurian Slugs in the new ''Film/StarTrek'' movie crawl down through the victim's throat. WordOfGod says they're a ShoutOut to the Ceti eels.
* In the short film ''[[Film/MichaelJacksonsGhosts Ghosts]]'', the Maestro (played by Music/MichaelJackson) possesses the Mayor (also played by Jackson) through the mouth.
* In ''Film/TheIsland'', the diagnostic sensors (which look like a cross between ticks and spiders) crawl into the body via the eyesocket.
* In Creator/JohnCarpenter's ''Film/PrinceOfDarkness'', the AntiChrist is a green liquid who enters into people via their mouths: the hosts then do the same thing to spread the possession, i.e. vomiting into other people's mouths.
* ''Film/EXistenZ'' is played this way.
* Played for laughs when ''Film/BillAndTed'''s ghosts try possessing two men. They squeeze in through the ears.
** "I totally possessed my dad!"
* In ''Scourge'', the titular black silverfish-like parasite enters through the navel.
* After he is blown to bits, Jason Voorhees's heart in ''Film/JasonGoesToHellTheFinalFriday'' evolves into a small creature which does this to take over bodies.
* In ''Film/{{Flubber}}'', the titular Flubber shoots into a Mook's mouth, ''wriggles around inside of him'', and then explodes out the back.
* In ''Film/FreddyVsJason'', the bug creature in Freeburg's nightmare forces itself down his throat.
* The snake scene from "Lady Terminator". [[GettingCrapPastTheRadar Still pondering how they got away with that.]]
* ''Film/FaustLoveOfTheDamned'': During the ritual to summon the Homunculus, M pulls an albino snake out of his mistress' abdomen before forcing it down the throat of an honest cop that he brainwashed to follow him.
* ''Film/{{Shivers}}'': The lust-spreading parasites enter through a person's throat, with someone who's already been infected kissing another person to spread the parasite. Or in one case, through a woman's vagina while she's taking a bath.
%%* ''Film/PiratesOfTheCaribbeanAtWorldsEnd'': Davy Jones kills a man by using the tentacles on his face to invade the man's orifices, including his mouth, his nose, his ears, and his eye sockets.

* The titular ''[[CatsAreMean Cat from Hell]]'' (a Creator/StephenKing short story adapted into the anthology ''Film/TalesFromTheDarksideTheMovie'') leaps into the mouth of a hitman hired to kill him, causing the hitman to choke to death before the cat goes all the way down his throat (we read/see just the tail wagging out of the mouth before it disappears into the victim). This really goes with RuleOfScary in TheMovie, where the cat is obviously way too big to do that (although vaguely hinted to be a spirit of vengeance).
* The babelfish of ''Literature/TheHitchhikersGuideToTheGalaxy'' enters the ear (but just stays in the ear canal), although it's more helpful than other creatures of this trope.
* The creature in Creator/PiersAnthony's novel ''Firefly'' does this.
* In ''Literature/{{Animorphs}}'', Yeerks take over human beings by way of infestation through the ear canal.
** Also Father in the Ellimist Chronicles, a giant sentient sponge (well, sort of) that sticks tendrils into the body to keep its victims alive (or in the case of the dead, keep them from decaying as long as they remain attached) and giving it access to their minds.
* In the short story "Motherhood Redeems Women" by D. Douglas Graham, [[spoiler:an aborted fetus decides to return to the womb by the same door he came out]]. {{Squick}} ensues.
* There's a story by Creator/TanithLee about a [[DemonicPossession demon that takes possession]] of humans via their orifices, so to try and prevent being possessed one guy blocks all of his orifices, but [[spoiler:forgets his urethra. Ow.]]
* In the ''Series/StarTrekDeepSpaceNine'' novel "The Siege", an evil shapeshifter kills a Cardassian by ramming himself down the victim's mouth, then expanding inside. In a later novel, Odo threatens to do this to a Cardassian officer should he dare to disturb Odo's regeneration.
* The biotech of the villainous Yuuzhan Vong in the ''StarWars'' ExpandedUniverse often does this. Numerous creatures fit the trope more exactly by slithering into ears or eye sockets, or down the mouth.
** Spore, in ''Literature/GalaxyOfFear'', combines this with evacuations. Its [[PuppeteerParasite hosts]] shoot vinelike tentacles out of their mouths and eyes; these sink into the skins of new victims and they are converted into new hosts within seconds. It doesn't actually leave its current hosts - its unwillingness to ever let go of anyone it's claimed is marked.
** In ''Literature/LukeSkywalkerAndTheShadowsOfMindor'', meltmassif/the Melters enter as spines thinner than needles through people's pores. When they're purged, they ooze out of pores and eyes and mouths as oily liquid.
* In Stephen Baxter's ''[[Literature/ManifoldSpace Space]]'', the hero Malenfant is integrated with an android/computer system. Tendril-probes infiltrate him... essentially everywhere, and there is no attempt at anaesthesia. He is doomed to live for billions of years in this state unless he fails in the task for which he was converted, in which case [[spoiler:a stellar event will occur that will kill every living thing in the galaxy except for archaeobacteria and slime moulds.]]
* ''Literature/TheFallen. ''Leviathan'' has people having their bodies taken over by making the creatures enter through their mouths.
* In ''Toys/{{Bionicle}}: Island of Doom'', Zaktan "lectures" one of his men, Avak, by [[WormThatWalks dispersing his body into the microscopic insects its made up of]], and swarming them into Avak's mouth and eyes.
* Ignatius of ''Literature/{{Horns}}'' can exert control over snakes. [[spoiler: He uses this to trick a large snake into slithering into the open mouth of an injured villain, resulting in his death.]]
* The victims interviewed in Budd Hopkins' ''Intruders'' retell of ear probing and possible tracking device installation.

[[folder:Live-Action TV]]
* It's one of the trademarks of ''Series/TheXFiles''. The Black Oil a.k.a. Black Cancer a.k.a. Purity is an alien virus that gets into your body through [[EyeScream your eyes]] and mouth and assumes complete control over it, optionally using it as a host for gestating a baby alien.
* One RealLife example was in ''Series/TheAmazingRace'', where one of the guy woke up partly covered by leeches, and one somehow crawled into his urethra.
* On the short-lived TV show, Series/BrainDead, the alien insects who are taking over people's bodies get in by crawling through someone's ear while they're asleep.
* ''Series/{{Sliders}}'' had an episode where Maggie gets taken over by a parasite that got in through her mouth.
* The prehistoric worm parasites in ''Series/TheOuterLimits1995'' episode "From Within" entered (and later exited as they died) through nostrils, mouths ''and'' ears. One girl actually had a worm go in her right ear (complete with blood) and at the end of the episode have it come out her left ear without leaving her with any ill effects (other than a great deal of pain).
* ''Series/DoctorWho'' TV Movie: the master in the form of a slug like creature crawls into the mouth of a sleeping paramedic to take control of his body.
* An episode of ''Series/{{Lexx}}'' had space carrots that take over people's bodies by ramming themselves up their anuses.
* ''Series/StargateSG1'':
** In a bit of a twist, through the mouth is the ''more pleasant'' way for a Goa'uld symbiote to enter a human host: Goa'uld normally enter through the neck, not wishing to see the expression of horror on their future host's face as their body is stolen from them. Only the Tok'ra, a [[DefectorFromDecadence breakaway]] [[MySpeciesDothProtestTooMuch group]] who only accept voluntary hosts, normally enter through the mouth.
** Non-Tok'ra will enter through the mouth to avoid leaving a visible scar, however -- if they have reason to suspect they will be attacked if discovered.
* The creature that inhabits Helen Magnus of ''Series/{{Sanctuary}}'' has a parasite exit through her ear canal [[spoiler:after she dies]]. Based on the dialogue, it got in through her pores.
* A classic ''Series/NightGallery'' episode has a man hiring someone to do away with a rival by planting an earwig in his ear at night, where it will crawl into his head, constantly eating (see "Real Life" below) -- in a karmic slip-up he gets it planted in himself. In a million-to-one fluke, he survives weeks of agony when it crawls out his other ear. With the boldness of one who's been through Hell he owns up to his deed and claims he'd do it again...[[spoiler:then he finds out the earwig was an egg-laying female.]]
* Hunting for mole lizards in Baja California, the host of ''Weird Creatures'' is told a local UrbanLegend that these worm-like animals will invade the anus of anyone who defecates over their burrows.
* In the ''Series/RiverMonsters'' episode "Amazon Flesheaters", Jeremy Wade interviews a man who has had an [[UnderStatement unpleasant encounter with a candiru]] and [[{{Squick}} shows video of the removal surgery]].
* In Series 4 Episode 4 of ''Series/{{Misfits}}'', Rudy sleeps in a slug-infested room in the community center, and one of the slugs crawls up his anus. He attempts to remove it by inserting some salt.
* In ''Series/{{Supernatural}}'', demons usually enter their meat suits' mouths as smoke.
* This is how the Nogisune tends to possess or influence people in ''Series/TeenWolf''. It tok control of its first body by entering it's mouth the form of a fly. Later, while in [[spoiler: Stiles's]] body, it released many more flies. They entered Isaac through his IV pump, Ethan through his nose, Aiden through his ear, and Derek through an open wound on his back, and acted as a HatePlague for all four of them.
%%* ''Series/StrangerThings'', Will Byers [[spoiler: gets possessed]] by the Mind Flayer when the monster shoves its smoke-like tendrils through the boy's eyes, nose, ears, and mouth.

[[folder:Music Videos]]
* Music/{{Bjork}}: During the music video of "Hidden Place" from ''Music/{{Vespertine}}''fluids flow in and out of Björk's nose, mouth and ears, but she doesn't seem to be bothered by it.


* The Alp-Luachra in Irish folklore is a kind of [[TheFairFolk fairy]] that takes on the form of a newt and crawls down the throat of anyone who falls asleep near a stream to feed off of the food that person has consumed. The only way to get rid of this creature was to eat a large quantity of salted meat and wait near a stream until the creature left the body to take a drink.

[[folder:Tabletop Games]]
* ''TabletopGame/DungeonsAndDragons'' 3.5 edition sourcebook ''Lords of Madness'' introduces a new (and decidedly creepy) aberration: the Tsochari (singular Tsochar), a mass of tentacles that bores into victims and can either coerce the victim into behaving itself by causing them great pain, or, kill the victim and wear the body as a disguise.
** And then there are hellwasp swarms that can enter a dead body and animate it... or enter a living body and [[BodyHorror force it to do what they want]]...
** And then there's the process of ceremorphosis, which a mind-flayer tadpole is inserted into the ear of a hapless humanoid (usually a captive human, orc or drow), which eventually turns them into a new mind flayer.
** And to crown the collection there's the DC90 Escape Artist check from the Epic rules. Combined with Enlarge Person...
*** Combined with the Exemplar class, who can among other things do stuff like substitute a Diplomacy skill check with Escape Artist, you can even do this and impress onlookers so much they will adore and admire you.

[[folder:Video Games]]
* Samus can pull this on the final boss of ''VideoGame/MetroidIIReturnOfSamus''. If you stun it with its mouth open, you can roll down its throat and into its stomach as the morph ball. It doesn't want to spit you back out until you [[AttackItsWeakPoint drop a few bombs]] and inflict massive damage.
** You can also do this in ''VideoGame/MetroidPrime'' as a CallForward and in ''VideoGame/MetroidOtherM'' [[spoiler:when you face the Metroid Queen again]].
* Daemites from ''VideoGame/BloodRayne'' force themselves into the victim's mouth, then take [[PuppeteerParasite control over the body]].
* G-Virus monsters of ''VideoGame/ResidentEvil2'' reproduce by implanting their spawn into a host through the mouth. If the victim is compatable with the monster (related by blood) the victim will mutate into a new one, otherwise the offspring [[ChestBurster explodes from the chest]] ''Franchise/{{Alien}}'' style and mutates into a different monster.
* Several of Las Plaguas were inserted at adult size into the mouth of the victims in ''VideoGame/ResidentEvil5'' for quicker control of the hosts.
* The alien species in Microsoft's ''VideoGame/{{Freelancer}}'' entered a host through the mouth and effectively take complete control of the body, including the host's memories and personality traits, or at least enough so that nobody realizes that the person they're talking to isn't really [[spoiler:the Chancellor]] anymore...
* In one of the dungeons in ''VideoGame/PokemonMysteryDungeon: Explorers of Time/Darkness/Sky'', Grovyle is attacked by a Spiritomb, which took control of his body by entering through his nose.
* One of [[EvilSorcerer Shang Tsung's]] fatalities in ''VideoGame/MortalKombat2'' is forcing himself into his opponent's body, causing them to inflate to ridiculous proportions followed by the victim [[LudicrousGibs exploding into a massive shower of blood and bones]].
* And then there are the [[VideoGame/EternalDarkness Bonethieves]]
* The Mysterious Shadows in ''VideoGame/DeadlyPremonition'' sometimes do this. WordOfGod says this is part of an attempt to return to life.
* The Winter Windster from ''VideoGame/WarioWorld'' flies into Wario's mouth if he looks at him while his eyes are red.
* The Death Slug from ''VideoGame/TheVisitor'' in it's larva[=/=]parasite form does this, allowing itself to be eaten or, [[AssShove taking the back door]] in order to [[BodyHorror absorb and messily kill it's host]]

* The slaver wasps in ''Webcomic/GirlGenius'' enter the body to enthrall their victims through the mouth.
* Yeon from ''Webcomic/TowerOfGod'' falls victim to a PuppeteerParasite that invades her gastro-intestinal tract. The fact that it was as big as her and disguised as a [[spoiler: MonsterClown]] makes it just as squicky as the fact that the way how it entered her mouth on the bed was shot made it reminiscent of something else entirely.
* The...uh...nurses(?) in ''Webcomic/{{Oglaf}}'' use a "polyp of cleansing" to cure the unfortunate Ivan of poison. The phrase "open your food tract, mammal" is employed, followed by a very unpleasant-looking panel. Of course, given which webcomic this is, perhaps we should be glad it was his ''mouth''.
* In ''Webcomic/CommanderKitty'', [[http://www.commanderkitty.com/2012/11/25/up-your-nose/ Commander Kitty ends up with one of his crew rammed up his nose after a transporter accident.]]

[[folder:Web Original]]
* In the animated short [[https://www.youtube.com/watch?v=IYgSt2zabh4 "The Pier"]], a strange creature stalks a bird-man as he fishes for a meal. The creature regurgitates one of its fish-like young into the water, and the child is "caught" by the bird-man who promptly swallows it whole. The baby then starts nibbling on the bird-man's stomach lining, causing him to collapse in agony. The creature grabs the bird-man and forces even more of its young into his throat. The short ends with the children gleefully munching away. Moral of the story? Always chew your food.
* ''Wiki/SCPFoundation'', [[http://scp-wiki.wikidot.com/scp-695 SCP-695 ("Eels")]]. SCP-695's life cycle starts when its juvenile form enters a human male through his mouth, nose, anus, and urethra.

[[folder:Western Animation]]
* In an episode of ''WesternAnimation/TheVentureBrothers'', The Monarch threatens to dunk the Venture family in a river teeming with candirus. Bizarrely, Dr. Venture claims the candiru are a myth (when it's just the part about them crawling into people that's made up).
* There's an episode of ''WesternAnimation/BatmanBeyond'' where the VillainOfTheWeek (an amorphous woman named [[JustForPun Inque]]), tries to suffocate Terry by forcing herself down his throat.
** Which is followed by a scene in which Terry graphically ''vomits her back up.'' Unfortunately, this doesn't stop her.
* In ''WesternAnimation/CodeLyoko'', XANA's specters generally possess people by entering through the mouth or the ears.
** In episode "Franz Hopper", instead of possessing one specter tries to clog Jérémie's airways by entering his mouth and nose.
* In ''WesternAnimation/AdventureTime'' episode "Jake vs. Me-mow", Me-mow climbs into Jake's mouth with a syringe of [[PoisonAndCureGambit poison]].
* ''WesternAnimation/LegionOfSuperheroes'' has Timber Wolf's father infecting him with nanites that enter through his ear while he slept.
* In one episode of ''TheSimpsons'', Groundskeeper Willie fills the auditorium with rats in revenge for being humiliated. Bart warns Milhouse not to open his mouth; of course, Milhouse starts to say "What?", at which point half a dozen rats leap in.
* PlayedForLaughs a few times in ''WesternAnimation/AvatarTheLastAirbender''.
** Happens to Sokka when [[TeamPet Momo]] grabs a spider out of his mouth to eat it.
** Momo is missing, and Sokka thinks Appa ate him, so he crawls in Appa's mouth to see. Appa just spits him out.
* ''WesternAnimation/LooneyTunes''
** Done in [[WesternAnimation/LooneyTunes Sylvester's]] first short "WesternAnimation/LifeWithFeathers", in which a [[IncrediblyLamePun henpecked]] male bird wants to commit suicide, so decides to feed himself to the cat. Of course, Sylvester is [[ParanoiaFuel suspicious]] about why the bird would want to do this, so he spends the entire cartoon running away, with the aforementioned bird chasing him and pleading to be eaten. Found [[http://www.dailymotion.com/video/x3li1j_life-with-feathers_family here]].
** This premise is later used in ''Cheese Chasers'', as mice Hubie and Bertie, going off cheese after binging on it, decide there's nothing to live for, and haunt Claude Cat trying to be eaten. Found [[http://www.dailymotion.com/video/x1atz9l_cheese-chasers_shortfilms here]].
** In "Beanstalk Bunny'', Bugs and Daffy try to get away from the giant (Elmer) by crawling into his ears and into his head. Elmer isn't hurt (indeed, his head seems quite empty) but gets angry and "smokes" them out by lighting a cigarette.
* ''WesternAnimation/SymBionicTitan'' takes this to a disturbing extreme. Xishi, a squid-like monster about the size of an average human, climbs ''all the way down her victim's throat'' and forces them to speak the truth. What's really creepy about it is that Xishi's face is visible from inside the victim's throat.
* Carrie from ''WesternAnimation/TheAmazingWorldOfGumball'' can posses someone by flying into their mouth and down their throat.
* The Geonosian Brain Worms from ''WesternAnimation/StarWarsTheCloneWars'' enter the victims through the nose, and take control of the body.
** A subversion occurs in Season 4, when [[spoiler: Obi-Wan voluntarily swallows a "vocal emulator", a spider-like device that changes his voice, in order to perfect his disguise as Bounty Hunter Rako Hardeen.]]
* Mr. Slave from ''WesternAnimation/SouthPark'' enjoys forcing small animals to crawl up his ass.

[[folder:Real Life]]
* The [[http://en.wikipedia.org/wiki/Candiru candiru]]. Unlike this fish, however, more parasites make a habit of ''leaving'' through various orifices, but they usually enter as eggs and [[BodyHorror grow inside the body]].
** Generalizations about the candiru's hunting methods rest on very little evidence, as there has been precisely one documented case of a human attack, in 1997. In particular, it is not chemically sensitive to either ammonia (excreted by fish) or urea (by humans).
* There's also an urban legend about earwigs crawling into your ears (hence the name), although they don't actually do that.
** Earwigs, as well as spiders and other creepy crawlies, actually do prefer small, tube-like spaces, and will occasionally find their way into someone's ear canal. They'll usually just leave as soon as they discover it's coated with slippery and unpalatable earwax.Supposedly this is why your ears and nose are so susceptible to itching.
** A similar urban legend persists about the average person swallowing seven spiders per year in their sleep, due to the offending arachnid crawling in the nose or mouth and not being able to climb back out. Spiders aren't prone to crawling into damp, ''breathing'' caves, so while occasionally this may happen, it's much rarer than the legend portrays. [[note]]In actuality, the "strange but true fact" was originally circulated as part of an experiment in human gullibility. Turns out, humans can be pretty damn gullible.[[/note]]
* Some Argentinian torture methods during the Dirty War involved a bunch of naked people in a small room, in fetal position, forming a circle. Then, their torturers dropped a starving rat inside the circle the people were making. The rat would try to escape by entering someone's ass, ''literally''.
** There are tales of this sort of torture from many different situations supposedly brutal in their methods. For instance, they say the [[UsefulNotes/DynastiesFromShangToQing Imperial Chinese]] did this from time to time, [[{{Dissimile}} except that there was only one person and the rat was in a hot cauldron strapped to the victim's ass]].
* This is how most scavengers consume carrion, as it requires the least amount of effort to get to the soft fleshy bits.
* Ants, such as army ants, will often attack a larger creature's soft spots in order to bring them down or drive them off. People being attacked by army ants can expect--in addition to painful bites and blisters--to get ants in their mouth, nose, eyes and ears. There have been a few cases where ants have killed infants and small children by [[CruelAndUnusualDeath invading their mouths and noses and more or less causing them to drown in biting, stinging ants]].
* Some species of parasitic worms [[AssShove crawl into people's anuses]]