Guaraqueçaba Ecological Station is located in the coastal area of Paraná State. It is part of the Atlantic Forest South-East Reserves, a World Heritage Site since 1999. The Site contains the most important habitats for in-situbiodiversity conservation in the region, and has a large diversity of endemic and migratory species such as the endangered green turtle (Chelonia mydas) and the vulnerable Franciscana dolphin (Pontoporia blainvillei). The Site is also a representative example of significant ongoing ecological and biological processes in the evolution and development of terrestrial, freshwater, coastal and marine ecosystems, such as forests and mangroves. These areas are important for different species including fish and invertebrates such as oysters and crabs. Invasive species and biological resource use represent threats to the Site.