A Meboid is a small amoeba-like creature that poses little threat to Samus. Despite the fact that it may seem so, it is not related in any way to the Metroids. It barely moves, and stays close to where it appears. These creatures may have made a return in Metroid Fusion as infected and/or X-mimicked variants called Yamebas.
"This is an amoeba-like creature. They just move back and forth."
- It is unknown if the Meboid species was infected by the X Parasites, as Samus never encountered any Meboid-X in Fusion.