Lake Sentarum National Park
The Lake Sentarum National Park () is a national park protecting one of the world's most biodiverse lake systems, located in the heart of Borneo Island, Kapuas Hulu Regency, West Kalimantan Province, Indonesia. It lies in the upper Kapuas River tectonic basin some 700 kilometres upstream from the delta. The basin is a vast floodplain, consisting of about 20 seasonal lakes, freshwater swamp forest and peat swamp forest. Local people call it as Lebak lebung (floodplain). The National Park is located in the western part of this basin, where three-quarters of the seasonal lakes occur. Approximately half of the park consists of lakes, while the other half consists of freshwater swamp forest. An area of 800 km2 was first gazetted as Wildlife Reserve in 1982, which in 1994 was extended to 1,320 km2 (890 km2 is swamp forest area and 430 km2 is dry-land) when it became a Ramsar site. In 1999 it was declared a National Park, however a National Park Authority was only established in 2006. Danau Sentarum National Park has a rich fish fauna with around 240 recorded species, including the Asian arowana and clown loach botia. During a biological expedition, scientists found species of such fish