It preserves tropical rainforest and the system of lagoons and streams, as well as its endemic and endangered species. It preserves marine ecosystems with key ecological processes for resident and migratory species that are important in the eastern tropical Pacific and for the sustainability of fishing sources in the region. It preserves the landscape quality, the geological peculiarities and the historical values, which includes vestiges of the Tumaco-La Tolita pre-Hispanic culture and the penal colony ruins, as sites for research, education, recreation and enjoyment.