What is a Metroid?
The entire franchise is named after Metroids, so naturally they play a key role in the plot. A Metroid is a curious artificial lifeform possessing a deadly ability. Parasitical in nature, Metroids range from a small, basketball-sized to massive elephant-sized variants. To put it simply, their physical bodies are roughly spherical transparent shells containing a central brain and nervous system, with a pair of dual fang-like protrusions hanging beneath. They have no visible eyes or any other visible sensory system. They also float and can fly anywhere they please, even in the vacuum of space to a certain degree. Metroids are deadly in the wild. If they catch suitable prey, the Metroid will attach itself to the lifeform and literally drain the life energy from its victim, engorging itself in the process (much like the Iratus bug from Stargate Atlantis). Metroids could also multiply relatively easily if exposed to certain types of radiation, adding to their already potent range of abiliti
