The Xenomorph species has many variations, from the Ovomorph to the Warrior, each with unique traits and abilities. The design of the Xenomorph, credited to artist H.R. Giger, has evolved with each new incarnation in the Alien franchise. Alien: Romulus introduces a new Xenomorph with a different life cycle and slight design variations compared to previous versions.

The Alien franchise delivered one of the most memorable movie monsters of all time, but fans of the series might not be aware of just how many Xenomorph types exist in the larger mythology. The Xenomorph's design is credited to the surrealist artist H.R. Giger, first appearing in a lithograph entitled Necronom IV. The endoparasitoid species first appeared in Ridley Scott's Alien and quickly became one of the most iconic extraterrestrial species in cinematic history. From there, the creature evolved with each new incarnation.

Unlike other extraterrestrial species in sci-fi, the...