What do they need to survive in the real world???

Some of the things that this Iguana needs for survival are the following, they live on black rocks because it gives them warmth to survive. But on days that the sun rays are beaming at a higher temperature this can become a threat to these iguana's. Also, cold temperature are a big no for the most part in the survival needs. This is due to the fact that if is stays into the water for to long it can go into shock.