Gargantis Proximae

The Gargantis proximae are or were semi-intelligent space-faring organisms whose homeworld is still not known. Like many other species, they were unfortunately assimilated into the Zerg Swarm in order to benefit their warriors in battle with their heightened senses. This assimilation process was exceptionally successful, and the Gargantis proximae soon became known as the Overlords, one of the highest-tiered Zerg strains in existence.

Unlike most other species that the Zerg consumed and dragged into their ranks, Gargantis proximae are likely still extant due to their semi-sapience and space-faring lifestyles, which would make it quite a difficult task for even the Zerg to eradicate them all.