Xindi-Primates resemble Earth humans and have a similar brain structure to the Xindi-Reptilians. They were one of the first Xindi species (including the Reptilians) to be informed of the "threat" posed by humanity. Degra, a Xindi-Primate, was assigned to develop the weapon which was to destroy Earth. In late 2153, the crew of the "Enterprise" boarded and studied a Primate's vessel and interrogated the crew. In the episode "", Archer learned from Degra that a colony of Primates resides on Azati Prime, where the weapon was being constructed. Like humans, Xindi-Primates have differences in skin tone. The chairman of the Xindi council was a Xindi-Primate.