Normally, these are not black. Their young ones have a biaxial stripe and the fully grown marine iguanas have grayish color. They actually have a dull color. They have the advantage to absorb heat from sunrays when they come out of water because of this dark color and can keep themselves warm. They mostly eat marine algae. The base layer growth of the organism can be made from newspapers easily. The other suitable alternatives are the inner as well as outer carpeting, linoleum lining or artificial glass. You should not use mud, soil, sand and bark as these will breed pest in them and cause damage to iguanas. You should clean the dwelling of iguana and sterilize it twice every week. At the same time, you have to provide water in it and it may not be closer to a sink or bathroom. Making the closet a safe and clean shelter for you iguana is a real perplexing task. You should not provide a very big space also as iguana may hide somewhere away from heat. You can use the lower two feet storage place. The mother iguana tries to find some best place to lay eggs and waits till their hatching is over. There are both natural as well as artificial nests for iguanas. The iguanas get their babies from both types of nests. The disadvantages are that, if the number of reptiles increases more than the owners have space in their homes, it will be a big problem to feed them. Many varieties of the iguana belong to arboreal category. These iguanas mostly live on the top of tree, in deserts, rocky trails and marine iguanas live in coastal areas in caves. Iguanidae family comprises primarily eight types of iguanas: These are Genus: Cyrclura, Amblyrhyncus, Conolophus, Brachylophus, Ctenosauria, Dipsosaurus and Sauromalus The Genus Cyrclura or rock iguana is found in Caribbean islands. It is most commonly found in Mojave deserts of South Eastern California, Southwest Utah, Sonoran deserts, Southern Nevada, California, Baja, Northeast Mexico ,South Central Arizona, and gulf of California Islands. It is fond of living in sandy and arid dwellings, generally under creosote bushes and rocks as its shelter.