Average chlorophyll concentration in the surface ocean (from mi-September 1997 to August 2007) from the ocean color sensor SeaWiFS (NASA). Subtropical gyres, in the center of the oceanic basins, are characterized by very low concentrations of chlorophyll a (dark blue) - Source : NASA's Earth Observatory (http:/earthobservatory.nasa.gov)

Jellyfish Leuckaztiara octona (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)

Foraminifera Ruber (Photo : Fabien Lombard)

Siphonophore  (Photo : Fabien Lombard)

Carte de la camapagne du navire oceanographique James COOK

Le trajet du bateau sur fond couleur de la mer.

Vue sous-marine d'un groupe de mésocosmes (© Stareso)

Profiling float (Photo : David Luquet)

Dinoflagellate Ceratium carriense var volans (Photo : Sophie Marro)

Dinoflagellate Ceratium arietinum var arietinum (Photo : Sophie Marro)

Dinoflagellate Ceratium teresgyr (Photo : Sophie Marro)

Ctenaria Eucharis multicornis  (Photo : Fabien Lombard)

Dinoflagellate Ceratium reflexum (Photo : Sophie Marro)

Villefranche-sur-Mer in stormy weather, winter 2011 -  Photo : J.-M. Grisoni

Instrumented buoy (Photo : David Luquet)

Dinoflagellate Ceratium praelongum (Photo : Sophie Marro)