gamma_metroid
The second stage of evolution of a metroid (creature). This one bears much likeness to it's previous_stage, but has grown legs, extra eyes, and gained some kind of energy discharge it utilizes in combat.
See also
* Metroid (creature)
** Metroid larva
** Alpha metroid
** Gamma metroid (you are here)
** Zeta metroid
** Omega metroid
** Queen metroid
* Metroid 2: Return of Samus
** Metroid: Samus Returns