Marine iguanas are unique reptiles found only in the Galápagos Islands. They are the only lizards in the world that have adapted to life in the ocean. These iguanas can dive up to 30 feet deep to feed on algae and seaweed, using their sharp claws to cling to rocks. With their dark, scaly skin, marine iguanas can absorb heat from the sun, which is essential for their survival in the cold waters. They have a flattened tail that helps them swim efficiently. These fascinating creatures are a prime example of evolution in response to their environment.