Bunaken is an 8 km ² island of Bunaken National Marine Park
Bunaken National Park extends over an area of 890.65 km ² which is only 3% of the land, including Bunaken Island and Manado Tua island, Mantehage, Nain and Siladen. Park is officially designated as a national marine park in 1991.
Bunaken National Marine Park waters reach the 1566 m deep in the Bay of Manado, with temperatures ranging between 27 to 29 ° C. Having biodiversity of coral, fish, echinoderms or sponges. In particular, 7 out of 8 species of giant clams that occur in the world, occur in Bunaken. It also claims to have seven times more genera of coral from Hawaii and has more than 70 % of known fish species in the Indo - West Pacific.
Crescent-shaped Bunaken, lie at the heart of the park. A snorkeler or diver diving around Lekuan or Fukui who is a place that has more than 33 species of butterfly fish