Kantherin

The Kantherin is a species of insectoids native to the planet Kantheros. The Kantherin are divided into three different castes: royals (queen, king, prince, princess), warriors, and workers, each of which have their own specific roles within Kantherin society. Kantherin have a unique ability to adapt to nearly any environment, something that has caused them to be called "cockroachs" by the people of Deraten.

Before the Firing of the Halo Array, the Kantherin had achieved spaceflight and began spreading to nearby systems. Fearful of what would happen should the Flood consume their worlds and their hives, the Forerunners would exterminate trillions and index what remained. After their re-seeding, the Kantherin were forced to crawl back up from the bottom of their homeworlds foot chain once again.