Description: The Xenomorph, also known as Xenomorph XX121, is a terrifying endoparasitoid extraterrestrial species from the Alien franchise, first appearing in Alien (1979). Designed by H.R. Giger, this biomechanical nightmare is defined by its sleek, black exoskeleton, eyeless elongated skull, acidic blood, and lethal double jaws. Its complex life cycle—starting with an Ovomorph egg, hatching into a Facehugger, implanting a Chestburster, and maturing into a Drone or Warrior—makes it a relentless predator driven by instinct to propagate and destroy. A symbol of primal horror, the Xenomorph embodies humanity’s fear of the unknown and uncontrollable.