Instrumented buoy (Photo : David Luquet)

Remote-controlled sailboat

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

Instrumented buoy (Photo : David Luquet)

Surface chlorophyll a concentration in the Mediterranean Sea.

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

Jellyfish Aequorea aequorea  (Photo : Fabien Lombard)

Dinoflagellate Ceratium tripos (Photo : Sophie Marro)

Squid larva (Photo : Fabien Lombard)

Jellyfish Rhizostoma pulmo  (Photo : Fabien Lombard)

Jellyfish Pelagia noctiluca  (Photo : Fabien Lombard)

Scientists collecting seawater samples from the rosette (Photo : Stacy Knapp, Woods Hole Oceanographic Institution)

Préparation et mise à l'eau des mésocosmes sur le ponton de l'observatoire océanologique de Villefranche lors de l'expérience menée en rade de Villefranche en février 2013 (© L. Maugendre, LOV)

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)

Foraminifera Ruber (Photo : Fabien Lombard)

Jellyfish Leuckaztiara octona (Photo : Fabien Lombard)

Satellite observation (GEOS-12) of Hurricane Katrina in August 2005 in the Gulf of Mexico - Source : NASA-NOAA