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The Marine Iguana is an iguana found only on the Galápagos Islands. It's color varies based on season. These dark grey Isabel Island iguana's have red areas idicating the mating season has just ended.
It has spread to all the islands in the archipelago, and is sometimes called the Galápagos Marine Iguana. It mainly lives on the rocky Galápagos shore, but can also be spotted in marshes and mangrove beaches.
Iguanas size is different depending on the island the individual iguana inhabits. The iguanas living on the islands of Fernandina and Isabela (named for the famous rulers of Spain) are the largest found anywhere in the Galápagos.