Bay of Arguin and Geba River Estuary on Coast of West Africa – December 22nd, 201115.0N 16.6W
The waters along the Atlantic Coast of West Africa appear green in two areas: in the Bay of Arguin, on the shores of Mauritania (top), and by the mouth of the Geba River, in Guinea-Bissau (bottom).
The waters in the former appear greenish due to phytoplankton growth, while the waters by the latter appear greenish due to brown sediments diffusing into the waters of the Atlantic.
The Geba is a river of West Africa that rises in Guinea, passes through Senegal, and reaches the Atlantic Ocean in Guinea-Bissau. It is about 340 miles (550 km) in total length. It broadens into a wide estuary below Xime (where it is joined by the Corubal River), with a total width of about 10 miles (16 km) at Bissau.