There are six sub-species of the Xindi: Primates, Aquatics, Arboreals, Insectoids, Reptilians, and Avians (extinct). Their history is turbulent and dominated by incidents of inter-species conflict. Their social structures are complex, and each species has distinct characteristics. The Aquatics are the enigmatic thinkers in the hierarchy, and the Primates are the intellectuals. The Reptilians are considered bold and aggressive, the Insectoids cold and devi-ous. The Arboreals are the most peaceful and calm, and would make skilled diplomats.
The Xindi are among the most unusual alien civilizations in the known galaxy. They were originally comprised of six sub-species, who were often at conflict with one another. This conflict led to the eventual extinction of the avian race. The key to aligning with the Xindi is their unification, and the installation of an organized governing body.