Alien (creature in Alien franchise)

Alien / Xenomorph XX121
An Alien as seen in Alien vs. Predator
First appearance	Alien
Created by	Dan O'Bannon Ronald Shusett Carlo Rambaldi H. R. Giger
Portrayed by	Bolaji Badejo (Alien) Percy Edwards (Voice, Alien) Carl Toop (Aliens) Tom Woodruff, Jr. (Alien 3, Alien: Resurrection, AVP: Alien vs. Predator, Aliens vs. Predator: Requiem) Joan LaBarbara (Voice, Alien: Resurrection) Archie Hahn (Voice, Alien: Resurrection)
Information
Type	Endoparasitoid lifeform
Homeworld	Xenomorph Prime

The "Alien" (also referred to as a "Xenomorph XX121") is a fictional endoparasitoid extraterrestrial species that is the eponymous antagonist of the Alien film series. The species made its debut in the film Alien (1979), and reappeared in the sequels Aliens (1986), Alien 3 (1992), and Alien: Resurrection (1997), as well as the crossover franchise Alien vs. Predator (2004) and Aliens vs. Predator: Requiem (2007). A similar creature of a slightly different design named the Deacon makes a brief appearance in the Ridley Scott film Prometheus (2012). The classic Xenomorph is set to appear in the sequel to Prometheus, Alien: Covenant (2017). In addition, the Alien appears in various literature and video game spin-offs from the franchises.

Unlike many other extraterrestrial races in science fiction, the Aliens are not "tool-makers"; they lack a technological civilization and are predatory creatures with no higher goals than the propagation of their species and the ultimate destruction of lifeforms that could pose a threat to them. Like wasps or termites, Aliens are eusocial, with a single fertile queen breeding a caste of warriors, workers, or other specialists strains. The Aliens' biological life cycle involves traumatic implantation of endoparasitoid larvae inside living hosts; these larvae erupt from the host's chest, orifices or intestines after a short incubation period, rapidly mature from juvenile into adulthood within hours, and seek out more hosts for implantation.