Note this page is about the Game Metroid I wrote this page so it's not empty but it might not be Canon from the Point of Alien.

The Metroid species are genetically engineered by Chozos to prevent the galactic spread of Extremely dangerous X-Parasites. In Chozo language, Metroid means Ultimate Warrior.

Most Metroids are almost equivalent to Facehuggers, expect they attach onto the head of the victim and slowly absorb their life energy.

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