Cuma Bay

Cumã Bay opens into the Atlantic on the deeply indented coast of Maranhão. Rivers and tidal channels cross the low shore, where mangrove forests grow in the sheltered estuarine waters. Large tides move water through the bays of the Maranhão coast, exposing mudflats at low water and flooding the creeks again on the rise. Islands and peninsulas divide this coast into a succession of sheltered inlets.