The Silicoids were crystalline beings. Their population grew slowly, but pollution and hostile environments did not harm them at all. This allowed for early colonization of rich, hostile worlds. The Silicoids were skilled at new computer research, but were poor in all other fields of technology. Their fleet preferred larger ships. Silicoid emperors were usually hostile and expansionistic. They were enemies of the Darloks, but were more favorably disposed towards the Humans, Klackons, and Meklars, thus joining them to the Alliance of Nations. Cryslon had long been the home of perhaps the strangest race in the known universe. Their appearance had greatly changed over time (their number of eyes had greatly decreased) but their general survivability remained. The Silicoids were silicon-based life-forms, and they were immune to pollution and did not require food to survive. They could support high populations on all types of planets.