Race Description: Captured iguanas kept as pets tend to be thin and nervous, often dying from side-effects of the stress of adapting to captivity - though if they're given a large swimming area in which to hide, their chances of survival improve, as they live on streambanks in the wild, diving in when alarmed or for other reasons. As they are cold-blooded creatures, they thrive in humid climates. The Green Iguana needs to be in temperatures of 75 to 90 degrees. If it is not kept under UVB lighting it can develop metabolic bone disease.