Danau Sentarum National Park has a rich fish fauna with around 240 recorded species, including the Asian Arowana and Clown Loach Botia.
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The proposed Heart of Borneo region includes a number of areas already under protection, such as: Batang Ai National Park, Lanjak Entimau Wildlife Sanctuary, Gunung Mulu National Park, Crocker Range National Park, Kinabalu National Park in Malaysia, the Kayan Mentarang National Park, Bukit Baka Bukit Raya National Park, Danau Sentarum National Park in Indonesia and the Ulu Temburong National Park in Brunei.