The Mustafarians were the native sentient species of the volcanic planet Mustafar. They were divided into two subspecies: the taller, thinner northern subspecies, and a smaller, stockier, and hardier southern subspecies. The two subspecies of Mustafarians had different physiologies as well as different roles in their society. The northern Mustafarians were significantly taller than their cousins and physically weaker. Because of their frail physiology, those who served as sentries commonly had their limbs enhanced with cybernetic prosthetics.