List of extraterrestrials in fiction by type

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This is a list of aliens that have appeared in various works of fiction featuring aliens, sorted by type.

Humanoid Aliens

Most aliens are humanoid if not human-like, especially in TV series because actors are human. The Greys described in UFO folklore match this body type. Humanoids include:

Near-relatives of mankind

In these stories, these aliens are descended from the same ancestors as humanity. Some are descended directly from humanity:

  • in Star Trek: The Next Generation, the episode "The Chase" revealed that all the humanoid races in the galaxy are the result of genetic tinkering by a single humanoid race in the distant past.
  • similarly, in Marvel Comics' The Eternals, it was revealed that many species were genetically tampered with by the alien Celestials.

Feline humanoids

This form has been popular. They are usually warrior-like as well:

Canine humanoids

Insectoid and Arachnid Aliens

Centaurs

Reptilians and Amphibians

Aquatic species

Parasites and symbionts

Robotic and Mechanical aliens

Space-Living Creatures

Sentient Plants & Fungi

Ancient Races

Aliens that have either disappeared and left only ruins or developed to godlike, practically omnipotent entities.

More unusual forms

Shape-shifting aliens

Unintelligent Creatures

Aliens From Other Dimensions

Galactic communities

Interstellar governments or communities in which several alien civilizations interact:

See also

References