Naf River is a transboundary river marking the border of Bangladesh and Myanmar. It is an elongated estuary in the extreme southeast of cox's bazar district dividing the district from Arakan (Myanmar). It rises in the Arakan hills on the southeastern borders of the district and falls into the bay of bengal. Its width varies from 1.61 km to 3.22 km. The Naf River's average depth is 128 feet (39 m) and maximum depth is 400 feet (120 m). Akyab in Myanmar is on the left bank and Teknaf upazila of Cox's Bazar district is on the right bank of the river.The river is influenced by tidal activity. Shrimp cultivation is extensively practiced on the floodplains of the river. [Sifatul Quader Chowdhury]
See map in chittagong region river system.