They mostly eat marine algae. The excess salts are released by their body through their nasal glands when they go for sunbath. Their faces become whiter because of the salt in their bodies. The color of male marine iguanas changes with the season. When it is the reproduction time, the adult males get a teal green or reddish color. You should be aware beforehand that they will need a large space and bigger containers after sometime. If you are interested in keeping pet iguanas, you should know all the important fundamental principles for bringing them up. The Selection of Iguana: When you buy infant iguanas to make your pet, you should buy the healthy reptiles, which are energetic and lively. 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. It is difficult to manage and control when they already exist in a huge number and will not survive unless they get full care, proper food and shelter. In addition, they can be fed green peppers, frozen mixed vegetable, squash, green beans and fruits such as apple, banana and mangoes. Young iguana should be fed daily. Sufficient Amount of Water: Iguanas should be given adequate water to drink. Usually, they eat plant and vegetables, which meets their requirement of water to some extent. You will have to install lamps or heaters to keep them warm in cold areas. Pet and Tamed iguana. You cannot tame your pet iguana so easily. You have to take their proper care and interact with them so that they feel comfortable and get acquainted with you and your family members. A tamed pet iguana will soon move freely in your house and will not eat anything by just getting excited. The parasites: The fleas get settled in the gastrointestinal tract of blood in iguanas and these are the main cause of their death when kept in confinement. Viral Infection: Many death of iguana occur due to the viral infection in iguana. The research is still on to find the causes and treatments for this virus.