|Scientific name||Internecivus raptus|
|Behavior||Highly aggressive towards any living lifeforms usually using stealth tactics to ambush its prey.|
|Language||A series of hisses and shrieks ranging from deep to high|
|Reproduction||Through implantation of an endo-parasitic embryo into a living host via facehugger.|
|Behind the Scenes|
|Created by||Dan O'Bannon|
|Designed by||H. R. Giger|
- "You still don't understand what you're dealing with, do you? The perfect organism. Its structural perfection is matched only by its hostility."
The Xenomorph XX121, better known just as Xenomorph (which literally translates to "strange form" from Greek ξενος, xenos=strange and morphe=form) or the "Alien", is an extraterrestrial endoparasitoid species with multiple life cycles, possibly originating from the planet Proteus (also known as Xenomorph Prime). One of the deadliest of all known alien creatures, these creatures require a host organism in order to reproduce. The appearance of the Xenomorph can vary depending on the host in which the Facehugger implants. The human phenotype is generally around 7–8 feet and roughly 136.0 to 181.4 kilograms in weight, with a long, muscular tail and large, curved, oblong head. The Queen of this species is generally twice as large (although some Queens have shown to grow even larger, some surpassing 100 feet tall if given time) and possess superior speed, strength and intelligence than their offspring.