An evergreen forest, thick and dense, covers rough insular territory of 2.400 hectares, frequently cloudy because of abundant and torrential rainfalls.
In this park, 235 different plant species (70 of them endemic), have been identified, 362 insect species (64 of them endemic) and 2 species of endemic reptiles: the lizard and the salamander; 3 spider species, 85 bird species, including the maritime ones (4 endemic ones), 57 species of crustacea, 118 species of maritime molluscs, more than 200 fish species and 18 coral species. In its waters, white-finned sharks are plentiful, as well as the giant hammerhead shark, the tuna, the parrot fish, the manta ray and the horse mackerel.
Among the island´s most distinctive tree species, the copey, the palo de hierro and the endemic palm tree are standing out. Among the birds the endemic ones are the most common species: the mosquero of the Isla del Coco, the cuclillo of the Isla del Coco and the fincho f the Isla del Coco. In the forests are common the espíritu santo, the white-colored bird that comes to the island to nest and which sets itself apart from others because it flies about the heads of the visitors.
The Isla del Coco is a territory of great scenic richness and a real laboratory for natural studies. There are plenty of ferns, bromelias, rivers, caninos and cascades, as well as valleys, cliffs and small islands, visited by an infinity of maritime birds and serving as nesting site for seagulls and bobo-birds.
The park features

various programs. The protection program cares for the compliance of the conservation laws for the natural resources, maintaining an adequate balance of the island´s ecosystems within the maritime and terrestrial limits.
Another function is to care for the security of the national and international visitors that come to this island.
The administration program sets the bases for the planning of all the park´s short- and long-term works.
The monitoring and investigation program sets the bases for the scientific investigative development in this area and should encourage it according to the park´s priorities.
Finally, the public usage program, whose target is to bring to mind the importance of protecting the populations of the most endangered maritime organisms (because of commercial usage) to the groups who dedicate themselves to fishing within the parks borders.