Different phytoplankton communities color the
ocean different shades of blue and green off the
southern coast of South Africa in the December 22, 2000,
Sea-viewing Wide Field-of-View Sensor (SeaWiFS) pass
over the area.
The convergence of two currentsthe cold Benguela flowing North along the west coast
of Africa, and a branch of the warm Agulhas heading west along the southern
tip of the continentcauses upwelling cold, nutrient-rich water which feeds. The
phytoplankton. The mixing cam also generate huge waves, making these waters very
treacherous to sail.