Phytoplankton bloom observed in the Barents Sea (North of Norway) in August 2010 by the ocean color sensor MODIS onboard NASA satellite Aqua. Changes in ocean color result from modifications in the phytoplankton composition and concentration. The green colors are likely associated with the presence of diatoms. The shades of light blue result from the occurrence of coccolithophores, phytoplankton organisms that strongly reflect light due to their chalky shells - Source : NASA's Earth Observatory (http:/earthobservatory.nasa.gov)

Dinoflagellate Ceratium candelabrum var depressum (Photo : Sophie Marro)

Dinoflagellate Ceratium ranipes grd mains (Photo : Sophie Marro)

Ctenaria Lampetia pancerina  (Photo : Fabien Lombard)

Mollusk  (Photo : Fabien Lombard)

Siphonophore  (Photo : Fabien Lombard)

Dinoflagellate Ceratium extensum (Photo : Sophie Marro)

Phytoplankton bloom observed by the ocean color sensor MODIS onboard NASA satellite Terra in May 2010. The bloom spreads broadly in the North Atlantic from Iceland to the Bay of Biscay - Source : NASA's Earth Observatory (http:/earthobservatory.nasa.gov)

Foraminifera Ruber (Photo : Fabien Lombard)

Siphonophores (Photo : Fabien Lombard)

Ctenaria Beroe ovata  (Photo : Fabien Lombard)

Squid larva (Photo : Fabien Lombard)

Rosette used to collect seawater samples during a scientific cruise in the South Pacific Ocean. During the austral summer, the amount of chlorophyll a is so low that the water becomes deep blue, almost purple. (Photo : Joséphine Ras)

Siphonophore  Forskalia formosa (Photo : Fabien Lombard)

Ciliate (Photo : Fabien Lombard)

Dinoflagellate Ceratium furca (Photo : Sophie Marro)