The Omega Metroid is the sixth (often final) stage of a typical Metroid's life cycle. Special Metroids will be able to metamorphose from the Omega stage into a Queen. An Omega Metroid is typically about twice the height of a human; its well-developed exoskeleton exposes only a small area of its softer membrane around its stomach. Like the previous Zeta stage, an Omega Metroid has a leech-like mouth, a bipedal structure, a tail, and four clawed limbs.