The play of tides and currents here has led to the formation of a chain of sandbars enclosing a placid lagoon that is some 32 miles [51 km] long and up to 9 miles [14 km] wide.
जवळच्याच समुद्रात येऊन मिळणाऱ्‍या नद्यांतून किनाऱ्‍यावरच्या उथळ पाण्यात बराच गाळ येऊन साचतो.