The Mayu river is named after Mayu Mountain, famous for its many peacocks; it was formerly known as “Manlayuwaddy”. It is the third most used river in Arakan State. The river originates where the Mayu and Sai Dun mountain ranges meet in northern Arakan; from there it runs for 154 kilometres (96 miles) before emptying into the Bay of Bengal, just west of Site-tway. Its vast valley encompasses much of Buthedaung and Rathedaung townships. In northern Buthedaung Township it converges with Sai Dun Creek. The sandy upper part of the river is called “Kulapanzun Stream”.