The sizes of marine iguanas also vary from one island to another. In Isabella and Fernandina, you can get the biggest marine iguanas of complete Galapagos Islands. There are smallest marine iguanas living in Genovesa. Marine iguanas are classified as poikilothermic creatures. They can spend only a short time in cold water of sea when they dive in search of their algae food. You can provide lukewarm water in tank for iguana to have bath. Sunlight: Natural light and sunrays are most important for your pet iguana cantina for their health. They get vitamins and minerals from sunlight and should be exposed to sunlight at least two to three hours daily. You can also place their cage in such a way that it is exposed to sunlight for some time. They are fantabulous swimmers as well. Over and above these qualities, the baby green iguanas are very strong. They jump and fall from the height of 40 to 50 feet without any sign of injury and stay safe and sound. The male iguanas are found with a flap called dewlap on ir skin. They impress their female iguana with this flap. The Red iguanas belong to terrestrial category and spend time in search of food within a short distance from their domicile. They cannot travel long to find any other suitable dwelling place as they easily get disjointed. The female red iguanas lay eggs in burrows dug by them in hot sunny areas. They cover their eggs and leave them unguarded. Some iguana will usually try to hide in the bottom portion. They may fall sick and get hypothermia. It is better to provide a circular closet bar and a shelf on top. If you fix the lights on bar, these will lie too low. The lights can be fixed at the top with some clips. Always try to allow for the maximum space for iguana. You may wonder about the size of this reptile when it grows up, all the accessories which you buy for your cute pet may become un-usable for their size after some time. The green iguana will look very small in its infant stage. It can grow to a huge size, if you know how to bring up and keep it healthy .