Derawan Island is located in Derawan Islands, Derawan District, Berau Regency, East Kalimantan.
Derawan Islands has three districts namely, Derawan Island, Maratua, and the Biduk biduk, Berau. There are at least four famous islands in this Archipelago, which is Pulau Maratua, Derawan, Sangalaki, and Kakaban.
In addition to its coral and fish diversity, the Derawan chain contains Indonesia’s largest nesting site for endangered green sea turtles, which emerge from the sea every night to lay their eggs on the white sand beaches of Sangalaki and Derawan Islands. Another island in the chain, Semama, is an important bird sanctuary, and Kakaban Island contains the world’s largest and most diverse jellyfish lake, with four unique species of stingless jellyfish. Kakaban is being considered for nomination as a UNESCO World Heritage Site.
In the surrounding waters there is marine park and is renowned as a tourist submarine for diving spot with a depth of about five meters. There are a wide variety of marine life here, such as squid (cuttlefish), lobster, ghostpipe fish, octopus (octopus bluering), nudibranchs, sea horses, ribbon Eels and scorpion fishes.
On a coral rock at ten meters depth, there is coral rock known as “Trigger Blue Wall” because of the reef with a length of 18 meters there is a lot of trigger fish (red-toothed trigger fishes). Beside, in Derawan Islands there are several small islands and coastal ecosystems which are very important such as the coral reefs, sea grass beds and mangrove forests. In addition, many protected species in the Islands of Derawan like green turtles, hawksbill turtles, whales, dolphins, clams, coconut crabs, mermaids, barracuda fish and some other species.
The Islands in Derawan archipelago is about 31 island, which is some of them are bar (gosong) and atoll. For my own information, atoll is a coral island surrounding by a lagoon partially or completely. The used of the lands by local inhabitant in these island is only limited for the home living. In addition, the land of the island in the Derawan archipelago still in the form of mangrove forests, thickets, limestone forest in Maratua and coconut vegetation.
The coral reefs in this Derawan archipelago wide spread throughout the island and bar or gosong in Derawan Islands. The shoal in these islands including Gosong Pulau Panjang, Gosong Masimbung, Gosong Buliulin, Gosong Pinaka, Gosong Tababinga and Gosong Muaras.
The types of coral reefs in Derawan Islands consist of reef edge, barrier reefs and atolls. These atolls have been formed into an island and being a lake of salty water and it has 460 to 470 numbers of species indicates that this is a wealth biodiversity, giving it the world’s second highest level of
hard coral diversity after the Raja Ampat Islands in eastern Indonesia.