Surface chlorophyll a concentration in the global ocean.

Copepode Sapphirina iris  (Photo : Fabien Lombard)

Instrumented buoy (Photo : Emilie Diamond)

Dinoflagellate Ceratium azoricum (Photo : Sophie Marro)

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)

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)

Amphipode crustacean  (Photo : Fabien Lombard)

Siphonophore  Forskalia formosa (Photo : Fabien Lombard)

Gelatinous plankton Pelagia and Ctenophores  (Photo : Fabien Lombard)

Annelid worm (Photo : Fabien Lombard)

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)

Deployment of a profiling float (Photo : Jean-Jacques Pangrazi)

Diatom species Odontella mobiliensis (Photo : Sophie Marro)

Larva of decapod crustacean  (Photo : Fabien Lombard)

Préparation des mésocosmes sur le ponton du laboratoire d'Océanographie de Villefranche lors de l'expérience menée en rade de Villefranche en février 2013 (© L. Maugendre, LOV)