Imago is a minor antagonist in Metroid: Zero Mission, being a race of large bee-like creatures in Ridley's Lair seeking revenge against Samus Aran for accidentally destroying their eggs.
The Imago race makes its first appearance their larva form called Kiru Giru, being the fifth boss Samus faces in the game on her journey through Nofair. Samus later encounters three more of these larva-staged bosses. The last one of this trio is ensnared in a family of vines, and Samus cuts it down. However, the fall through the ground instantly kills it on impact. In Ridley's Lair, Samus watches the evolution of the third and final Imago as she becomes a bee-like monster, and a final battle erupts.
Metroid Prime 3: Corruption