Yameba

Unknown Life Form 1, has the unofficial name, "Proto Metroid". This creature's true name and species are currently unknown. An argument over what this creature's species is and what it represents can be found on the talk page.

Known Attributes
This creature is Amoeba-like in appearance, but is enlarged to an incredible size. It has the ability to hover through the air, and has the ability to increase in size whenever an X Parasite merges with it. These creatures slowly drain off energy from Samus whenever she is in direct contact with their outer membranes.