zeta_metroid
The third stage of evolution of a metroid (creature). Compared to it's previous_stages, this one has developed a full body, bearing similarity to xenomorphs- except more reptilian in movement and appearance.
See also
* Metroid (creature)
** Metroid larva
** Alpha metroid
** Gamma metroid
** Zeta metroid (you are here)
** Omega metroid
** Queen metroid
* Metroid 2: Return of Samus
** Metroid: Samus Returns