The Galapagos Islands are famous for the variety of endemic, engaged species that live across the archipelago, so there are plenty of rare varieties that the area is famous for. One of the rarest is the marine iguana, which is the only oceangoing lizard in the world and lives entirely on a diet of marine algae. This endangered species is threatened by changes to its habitat caused by global warming and also by invasive species that have been brought to the Galapagos by humans and attack the iguana’s eggs and young offspring.