Revillagigedo is a group of four volcanic islands located in the pacific ocean and 250 miles from Los Cabos, México. This archipelago represents an authentic submarine mountain system. The islands biota presents a considerable degree of endemism, both on land and in its surrounding waters, particularly concerning birds. The marine fauna is characterized not only by its beauty but also for its high diversity, invertebrates, birds, corals, mollusks, sharks, fish and mammals. This area has been recently declared a part of UNESCO world heritage list.