On the southern coast of Bahia, 70 km from the shore, the Abrolhos archipelago was the first Marine National Park established in Brazil.
The Park aims to conserve samples of an exceptionally rich marine ecosystem with reefs, algae, and fish fauna, and to protect endangered species, 
especially sea turtles, humpback whales, and brain corals, reconciling the complete protection of flora, fauna, and natural beauty with use for educational, recreational, and scientific purposes.
The area was previously a fishing zone. It features an old naval lighthouse, but there were many shipwrecks due to the navigation difficulties among the existing reefs in the archipelago. Historical references reported by historians indicate that Portuguese navigators received the warning 
“Open Your Eyes” due to the dangers of navigating there. This is where the name Abrolhos comes from, an archipelago that has always been a reference point for navigators.
It is located on the southern coast of Bahia. Access can be made by speedboat, fishing boat, or schooner, departing from Caravelas. Caravelas is 950 km away from the state capital.
The park offers excellent areas for autonomous and free diving, as the coral formations host a great diversity of marine fauna. On the islands, the attraction lies in the birds nesting among the rocky formations. Various vessels 
offer day trips or more to the unit.
With a tropical climate, stable temperatures, and high rainfall, it is situated on five rocky formations: the islands of Santa Bárbara, Siriba, Redonda, Sueste, and Guarita, formed 50 million years ago. There is a great diversity of marine fauna, with numerous species of fish, mollusks, corals, sponges, etc. Among the terrestrial fauna, the birds that reproduce on the islands stand out: boobies, terns, frigatebirds, tropicbirds, and the benedito, primarily. The humpback whale and sea turtles seek the park for breeding.
The archipelago is also rich in birds, which use it as a stopover point during migrations or even for breeding, as they find a large number of fish for their diet. Along the steep cliffs, caves, or clearings, the most frequent species are the benedito (Anous minutus), masked booby (Sula dactylatra), brown booby (Sula leocogaster), tropicbird (Phaethon aethereus), frigatebird (Fregata magnificens), and rock terns (Sterna fuscata).
Sources: www.brasilturismo.com and www.portalsaofrancisco.com.br/meio-ambiente/parque-nacional-marinho-de-abrolhos