History Main / AlienTropes

* NotQuiteHuman: An alien that is practically the same as a human except for one difference.
** AmazingTechnicolorPopulation: Their skin color is vividly outside the human range.
* RubberForeheadAliens: An alien whose face is significantly different from a human's, but only in their face.
** GreenSkinnedSpaceBabe: An alien woman who looks like a human except for one or two obvious differences, and who at least one person in the main cast is attracted to if she's not just MsFanservice.
** SpaceElves: Aliens who think they're superior (or might even ''be'' superior in some cases) to us, and act like [[OurElvesAreDifferent a certain fantasy race]].
** SpaceOrcs: Aliens who are brutish, violent and primitive, often very apelike.

* AngelicAliens: Graceful aliens that look sort of like humans and are seen as extremely beautiful.

* AlienFairFolk: Aliens that look like fantasy creatures from Earth's folklore (fairies, gnomes, trolls, goblins) or fantasy creatures who pretend to be aliens.
* LittleGreenManInACan: Aliens that you can't tell what they look like as they all wear strange outfits.
* MechanisticAlienCulture: Aliens that are organic, but act like robots and have very tight schedules.

* AlienAnimals: Aliens that look ''exactly'' like Earth animals or aliens who are actual Earth animals not from Earth.
** KillerSpaceMonkey: Aliens that look like monkeys or non-human apes and are evil.
** SpaceWhale: Aliens which look like whales and can "swim" though space.
** SandWorm: Giant alien worms that live in the desert.
* StarfishAliens: Aliens that are radically different from humans.
** ExtremophileLifeforms: Aliens and other beings evolved to live in conditions seemingly hostile to life.
** OctopoidAliens: Aliens that look like squids, octopi or jellyfish.
** TentacledTerror: Tentacles are a common feature of aliens, octopoid or otherwise.
** LivingGasbag: Floating aliens that are literally full of gas.
** XenomorphXerox: Extraterrestrials with the appearance and/or reproductive cycle of the eponymous creatures of the ''Franchise/{{Alien}}'' franchise.

* BlobMonster: Aliens that resemble shapeless blobs.

* MechanicalLifeforms: A race of robots or cyborgs that are treated as a real species.
* LivingShip: A ship that's alive.
* EnergyBeings: Non-corporeal aliens.
* GeniusLoci: A sentient place.
* SufficientlyAdvancedAlien: Aliens that are so advanced that their technology seems like magic to humans.
* EldritchAbomination: An alien that just makes no sense.

* GenericDoomsdayAlien: Aliens with no clearly defined cultures or motivations.

** SpaceElves: Aliens who think they're superior (or might even ''be'' superior in some cases) to us, and act like [[OurElvesAreBetter a certain fantasy race]].

* RubberForeheadAliens: An alien whose face is significantly different from a human's, but only their face.

** SpaceElves: Aliens who think they're superior (or might even ''be'' superior in some cases) to us, and act like a fantasy race.

** SpaceWhale: Aliens which look like whales.
* SandWorm: Giant alien worms that live in the desert.

* AlienAnimals: Aliens that look ''exactly'' like Earth animals.

** TheReptilians: Aliens that look like humanoid reptiles.

* SmallAnnoyingCreature: A small alien sidekick who annoys everyone.

* AlienWorks

%%* AlienWorks

* AlienWorks

'''Media index:'''

'''Trope index:'''

* SlidingScaleOfAnthropomorphism: This page contains a general list of ways that extraterrestrial characters can range in appearance, from humanlike to more alien.

!!Tropes

* AlienWorks: An index of fictional works that star/center on aliens.

* BizarreAlienBiology: Aliens that work physiologically different from humans in all kinds of weird ways.

!!Tropes

* AlienWorks: An index of fictional works that star/center on aliens.

* BizarreAlienBiology: Aliens that work physiologically different from humans in all kinds of weird ways.

* {{Lunarians}}: Aliens from Earth's moon.

* {{Martians}}: Aliens from Mars.

* GreenIsUnnatural: The color green associated with aliens.

* Martians: Aliens from Mars.