The Z'ood are a humanoid species, easily distinguished by the single horn on top of their hairless heads.
Although they were classified as mammals, Z'ood's are nearly hairless. They have a single black horn at the crown of their heads, four digits on each hand and foot, pointed ears, and large black eyes. Their skin vary from yellow to dark brown.
The Z'ood home planet of Beta Rigel IX is geologically unstable, with frequent volcanic eruptions. The large, black eyes of the Z'ood were adaptations to the clouds of volcanic ash which darkened eta Rigel IX's skies. Though they were most comfortable in the naturally dim light of their homeworld, Z'ood could adjust to Human-standard levels of light with minimal discomfort.
The Z'ood are strictly vegetarian, being unable to properly digest meat.