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A romance, sexual or otherwise, between two different species. Sometimes they are HumanoidAliens, or they can be a FriendlyNeighborhoodVampire and a human, two {{Funny Animal}}s, or a BeastAndBeauty couple. The type of species can diverge greatly, so long as they are different.

May include a moral about the FantasticRacism version of inter-racial romances. Also may be StarcrossedLovers. Anyone looking for more built in angst will make one of these a MayflyDecemberRomance. In [[MohsScaleOfScienceFictionHardness less realistic]] settings, can easily result in {{Half Human Hybrid}}s or {{Hybrid Monster}}s, or even {{Random Species Offspring}}s.

Chances of it actually becoming an OfficialCouple (and evolving into a mixed marriage) are increased if the nonhuman has a [[HumanAliens human form]]. Although there is an element of {{Squick}} amongst a certain number of audience members, most people accept it in cases where there are ''no'' humans involved. For anthropomorphic animals, this can be a source of FurryConfusion, especially if they're the ''only'' couple seen to be of different species.

For some this is [[BoldlyComing the way to go about First Contact]]. [[AlienInvasion Alien invaders]] seemingly love to tempt humans with this as part of their {{Masquerade}}, although [[JustForFun/HowToInvadeAnAlienPlanet you'd think they'd learn better]].

See also: ExtremeOmnisexual, BoldlyComing, BestialityIsDepraved, MarsNeedsWomen, DivineDate, MagicalGirlfriend, DeusSexMachina, DidYouJustRomanceCthulhu, BoyMeetsGhoul, {{Robosexual}} (for when the "species" barrier is a robot, AI, or other artificial lifeform), HotSkittyOnWailordAction (for when you wonder how these two things could actually reproduce, or at least engage in activities that would lead to reproduction with members of their own species), MuggleMageRomance and WhatMeasureIsAHumanoid. May involve ExoticEquipment or the MaleToFemaleUniversalAdaptor. May lead to {{Half Human Hybrid}}s or to a NonhumanLoverReveal if one member was keeping secrets. If society does not approve of such romance, then it's also MalignedMixedMarriage. InterspeciesFriendship and PredatorPreyFriendship are the platonic versions of this trope. It may also involve [[NonStandardKiss Non-Standard Kissing]].

!!Examples with sub-pages:

* InterspeciesRomance/{{Advertising}}
* InterspeciesRomance/AnimeAndManga
* InterspeciesRomance/{{Apparel}}
* InterspeciesRomance/ComicBooks
* InterspeciesRomance/{{Fanfic}}
** ''[[InterspeciesRomance/TheReviewTeam The Review Team]]''
* InterspeciesRomance/{{Film}}
* InterspeciesRomance/{{Literature}}
* InterspeciesRomance/LiveActionTV
* InterspeciesRomance/MusicVideos
* InterspeciesRomance/MythologyAndReligion
* InterspeciesRomance/TabletopGames
** ''InterspeciesRomance/DungeonsAndDragons''
* InterspeciesRomance/{{Theatre}}
* InterspeciesRomance/VideoGames
* InterspeciesRomance/VisualNovels
* InterspeciesRomance/{{Webcomics}}
* InterspeciesRomance/WebOriginal
* InterspeciesRomance/WesternAnimation

!!Examples without sub-pages:


* Spuds [=McKenzie=]: what a playah! What a ''dog'' playah! What a dog playah with ''human'' girlfriends...er...right.
* The "twist ending" to an [=AirWick=] air-freshener commercial is that the talking elephant housewife's husband is a many-stinky-shoed ''centipede''. Pairings in other ad campaigns include chimpanzee-skunk, giraffe-boar and penguin-bear. The last one's sons are ''[[BigLippedAlligatorMoment pigs]]''.
* Fruit By The Foot [[http://www.youtube.com/watch?v=V9oAd7uHeVQ has a commercial]] with a female lizard getting attracted to a young human male after mistaking the long strip of gum stretching from his mouth for a prehensile tongue.
* Pretty much all of the Orangina ads, but especially the big musical number with the [[http://www.youtube.com/watch?v=ck14LKBI9GM bear and the deer]].
* [[http://www.youtube.com/watch?v=ls6eIbiKvUM This ad]] and [[http://www.youtube.com/watch?v=LsJiGF_Groo this ad]] imply that the Kia Soul hamsters find human women attractive.
* There's a commercial for a ''WesternAnimation/DoraTheExplorer'' mermaid Dora toy, which shows a mermaid girl whose mother is a human and father is a giant fish.
* [[https://www.youtube.com/watch?v=l-NLT_jOfww This ad]] for the Bank of Queensland pairs a human hunter with a deer.
* Direct TV's ads feature a man married to a human-sized living marionette. [[{{Squick}} They even have a son]].
* Commercials for Sprint's Framily plan show Creator/JudyGreer married to a hamster. They have three kids: a man (played by Kyle Mooney who's only nine years younger than Greer), a southern boy, and a French girl.

[[folder:Asian Animation]]
* In ''Animation/GuardianFairyMichel'', Sir Brown the fairy fell in love with a human princess. Thanks to a war, it never worked out.

* ''Manhwa/CielTheLastAutumnStory'' has the godlike-Arc Dragon in human form Krohiten and mortal human Carola. Which ends up killing Carola due to the strain of the eventual pregnancy. And then, because Krohiten is kind of an emotionally-compromised god, he ends up in another one with Yvienne.

* "Star Girl" by Music/McFly was about an interspecies romance between a human and an alien. According to Tom Fletcher, the song was based on a dream he had where he romanced an alien woman.
* "In CNR" by Music/WeirdAlYankovic, one of Charles Nelson Reilly's many accomplishments was making sweet, sweet love to a manatee.
* "Interspecies Love" by Kevin Blechdom. Aliens again.
* [[http://www.youtube.com/watch?v=ya0X53SN7R8 "My Beloved Monster"]] by Eels.
* [[http://www.youtube.com/watch?v=z2kc570KwUs "Herr Mannelig"]]. She's a mountain troll. Though the 'romance' in this case is pretty one-sided.
* Sadly, parental disapproval averted Herman's and Sally's inter-crustacean romance in the Smothers Brothers' comedy song "Crabs Walk Sideways".
* From ''Series/WhoseLineIsItAnyway'', there's the song [[http://youtube.com/watch?v=xf-tQxMSxos "Bubbles"]], which was made up one-word-at-a-time and is about [[DidYouJustRomanceCthulu a man romancing a sea monster.]]
* "Fish and Bird" by Music/TomWaits, tells the story of two StarCrossedLovers: a bird and a whale. As ridiculous as the premise sounds, it still manages to be deeply sad.
* Orangutan/human in Megadeth's [[http://youtu.be/fLN1OB3_wG8 "Public Enemy Nº 1"]] video (implied).
* The music video for the song [[http://www.youtube.com/watch?v=PtMU8nvZzOs "Close But No Cigar"]] by Music/WeirdAlYankovic is all about this. It was made by Creator/JohnKricfalusi, so it's not surprising...
* The music video of [[https://www.youtube.com/watch?v=xweiQukBM_k "Opposites Attract"]] has Paula Adbul dancing with and romancing a cartoon cat named M.C. Skat Kat.
* [[http://www.youtube.com/watch?v=t5Sd5c4o9UM "E.T."]] by Music/KatyPerry and Music/KanyeWest. The video begins with the song "Where in the World Can My Lover Be?" by Midge Williams & Her Jazz Jesters playing in the background. As the music begins, Kanye is shown in a spacecraft revealing pictures before zooming out of the craft. In the video, Perry, as an "alien", drifts through outer space before landing on an abandoned Earth covered with litter. Clips are interspersed of large felids hunting game. She comes across a broken robot (resembling a spaceman), which turns into a naked male, played by Shaun Ross upon her kiss. It is eventually revealed Perry's legs are in fact those of a gazelle. Meanwhile, West is featured in the video floating in a traveling spacecraft.
* "Runaway" is a 35-minute short film (it serves as the music video for a compilation of songs from West's album, "My Beautiful Dark Twisted Fantasy") directed by Kanye West. The film depicts a romantic relationship between a man and a half-woman, half-phoenix, and is set to music by West from his album.
* Pretty much any relationship GWAR has.
* The second version of the music video for "[[http://www.youtube.com/watch?v=vOiYsKKe2vQ Bad Boy]]" by Miami Sound Machine, which features the cast of ''Theatre/{{Cats}}'' in their cat costumes, one of them getting really cuddly with Music/GloriaEstefan's character (who's human, though she sports a cat tail at the end of the video).
* The music video for [[http://www.youtube.com/watch?v=fxvGHQHiY70&ob=av2e "Peacebone"]] by the experimental rock group Music/AnimalCollective shows a blossoming romance between a human woman and.. [[EldritchAbomination something else.]]
* In the music video for [[http://www.youtube.com/watch?v=IsuVMdnF8A0&feature=relmfu Spectrum]] by ZEDD, a man meets and falls in love with an [[BoldlyComing alien woman]] whose spaceship appears in front of his house and leaves her there.
* [[https://www.youtube.com/watch?v=bAsKIvRH2ds I'm In Love With a Monster]] by Music/FifthHarmony.
* "Yeti" by Music/BadLipReading details a romance between the titular yeti and Chris Martin from Music/{{Coldplay}}, which seemingly ended in a tearful breakup after they had an argument about the yeti getting too fat.
* "Godzilla" by Music/{{Kesha}} is about dating, well, Franchise/{{Godzilla}}.

* ''Series/ChickenMinute'', a canadian show from the 90s, featured Minute, a fox, being in love with Chicken Mama, a hen with whom he even lives.
* ''Franchise/TheMuppets'' has Kermit the Frog and Miss Piggy.
-->'''Kermit''': Me? In love with a pig? Wait 'til I tell the guys in marketing! Ha ha! Maybe you expected me to go HOG-wild? Perhaps you could bring home the BACON! Ahhh... the sounds of love, SU-EEEEE! Oink, oink.
** Also, Gonzo, whose species was unknown at the time but is now said to be some kind of alien has an attraction to birds, especially chickens, and in one case, a cow.
** Also, in one episode he was infatuated with Madeline Khan, a human.
** And in the [[AnimatedAdaptation cartoon spin-off]], ''WesternAnimation/MuppetBabies'', he's in love with Piggy. Camilla, is, alas, just a stuffed toy in that version.
** ''Film/TheMuppetsTakeManhattan'' contained this exchange:
---> '''Brooke Shields:''' Is something wrong?\\
'''Masterson Rat:''' Do you believe in interspecies dating?\\
'''Brooke Shields:''' Well, I've dated some rats before, if that's what you mean.
** It got weirder in ''Film/MuppetTreasureIsland''. Benjamina Gunn (Miss Piggy) apparently had relationships with the humans Captain Flint ''and'' Long John Silver, the former of whom abandoned her on the island after their relationship ended. Her former fiance Captain Smollett (Kermit) seemed disturbed by this revelation, but it may have been more because of her promiscuity than the interspecies aspect.
** Piggy's been known to throw herself at hunky male humans on ''Series/TheMuppetShow'' before. Creator/ChristopherReeve comes to mind. Also Patrick Wilson, drummer for Weezer, in the "Keep Fishing" video. Neither one reciprocated.
*** Charles Grodin, however, was quite enamoured with her in ''Film/TheGreatMuppetCaper''. As was John Ritter in ''The Fantastic Miss Piggy Show''.
** In the 2015 series ''Series/TheMuppets'', Kermit and Piggy have split up, and Kermit is dating another pig named Denise, who works in marketing. Miss Piggy meanwhile, is again attaching herself to human guest stars. And Fozzie has a human girlfriend whose parents are [[MalignedMixedMarriage a bit freaked out]].
* The Henson Alternate pilot ''Tinseltown'' was about Bobby Vegan, a pig, and his life-partner Samson Knight, a bull.

* ''Radio/BleakExpectations'': Considered, though mercifully never attempted, by [[BigBad Mister Benevolent]] and [[BunglingInvention Harry Biscuit]] in regards to Juanita Hotchille, a SpicyLatina who has [[ItMakesSenseInContext wound up in the body of a dinosaur]], which has done nothing to decrease her sex-appeal.
-->'''Mr. Benevolent:''' She's a Dinosaur. Wouldn't it be wrong?
-->'''Harry Biscuit:''' I've asked myself the same thing.


[[folder:Web Animation]]
* ''WebAnimation/ThereSheIs'', in which a female rabbit falls in love with a male cat. The interspecies part of their relationship plays a big role in the plot: Such romances are extremely frowned upon in their societies (a metaphor for the strained relationship of Japan and Korea).
* ''WebAnimation/HappyTreeFriends'': Considering that most of the characters are different species, this was inevitable. The {{Official Couple}}s are Cuddles (a rabbit)/Giggles (a chipmunk) and Handy (a beaver)/Petunia (a skunk).
* In ''WebAnimation/BowsersKingdom'' episode 8, Steve the Piranha Plant fell in love with a [[VideoGame/SuperMarioWorld Dino Rhino]] (with a bow and lipstick). The [[VideoGame/SuperMarioGalaxy Dino Piranha]] was the resulting lovechild.
-->'''Jeff:''' How did you even do that?
-->'''Steve:''' Oh I don't know I was drunk.
* In the episode Typomaniac Vol. 1 of Starters, Chikoria thinks that Chespin and Fenniken are dating and begin to laugh at them for that.