Physically, they are of medium height and have light but muscular bodies. With an average height of about 5 feet, they are the largest of the Saurians. They come in different colors and liveries: some families have a bluish color with bright markings, while others can vary from green to lavender to black, and even to reddish-brown or bright red. They possess a row of spines along their backs and long tails, which can be used to deliver painful strikes. When grabbed by the tail, Iguanas can allow it to break so they can escape and eventually regenerate a new one. In addition, they have a well-developed dewlap, which helps regulate their body temperature. They have excellent vision, enabling them to detect shapes and motions at long distances, but poor vision in low-light conditions. At the same time, however, they are able to see ultraviolet wavelengths. They reproduce by oviparity, with females laying a pair of eggs in a sandy basin after fertilization occurs through sexual acts.

The Iguana people are a warrior race who dominated the southernmost part of Sephyr and were an example of a kingdom that relied on indirect methods of government: they didn't exercise supreme authority but simply exacted tribute from controlled lands. Most of their lands were organized into city-states, ruled by a tlatoani or king. The highest-ranking social class is made up of pilli, the nobility, who are involved in social and financial issues. The second class is made up of mācehualli, or peasants, whose importance can grow depending on the assets they own and could rise to a sort of entrepreneurial class. The rest of society is made up of warriors, artisans, and merchants. Finally, the priestly class, highly regarded, is engaged not only in carrying out religious practices but also in educating young nobles. After birth, Iguanas are subjected to severe tests and a series of passage rituals towards maturity. Until adolescence, their education is their parents' prerogative, but under the authorities' supervision. Then it passes under a free and fair state education.

The Iguana people are skilled in orchard growing and crafts, from ceramics to wood. Songs and poems are very important to them, and there are many theatrical and poetic competitions. A known aspect of their culture is the practice of sacrifice, which is considered necessary to feed Zundoey, and many of them consider it a great honor to be sacrificed.