Marine iguanas are said to be blackish in color and prospering on the sea. 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. There is a green breed of iguanas, that is commonly seen in Paraguay, Brazil, Mexico and Caribbean Islands. Green iguana is the favorite of hunters, but it is not yet considered as imperiled breed of animals anywhere as is sometimes misunderstood like that. Hunters prefer to catch the large female iguanas. Heat tape, under tank heaters and ceramic lights are some of the other alternatives. The Food: The food given to iguana should be healthy and nutritious. You can follow a diet plan for them in consultation with an expert. The iguanas normally eat plants, vegetables and fruits. They should not be fed food containing animal protein. Iguanas are Herbivores: Herbivores are the form of creatures that eat plant and vegetation. There are many reptiles, which cannot live exclusively on plants and they eat meat of insects or other animals. Iguanas are different in this respect. This is one of the major reasons for people to keep them as their pets. They possess multi jointed delicate toes that make them climb easily. They have exceedingly sharp claws. The crest on the back of males is heavier than female iguanas. They have a wide mouth and sharp teeth, short nostrils and exterior ear drums. Iguanas have a third eye also at top of head, which watches the movements over the head. Useful information about Iguana Nests The iguanas are kept as pets by many people. At present, these are imported from iguana breeding farms in Central and South America. Their breeding, which is done in captivity, has raised many arguments as it is going to impose some restrictions on the present demand of iguanans.