Dinoflagellate Ceratium furca (Photo : Sophie Marro)

Dinoflagellate Ceratium extensum (Photo : Sophie Marro)

Dinoflagellate Ceratium ranipes grd mains (Photo : Sophie Marro)

Ocean color satellites travel around the Earth at an altitude of about 700 to 800 km.

Underwater glider (Photo : David Luquet)

Large rosette sampler used in the "World Ocean Circulation Experiment". This rosette has 36 10-liter Niskin bottles, an acoustic pinger (lower left), an "LADCP" current profiler (yellow long tube at the center), a CTD (horizontal instrument at the bottom), and transmissometer (yellow short tube at the center). (Photo : L. Talley)

Instrumented buoy (Photo : David Luquet)

Krill (Photo : Fabien Lombard)

Radiolarians  (Photo : Fabien Lombard)

Les mésocosmes attirent les poissons ! (© Stareso)

Dinoflagellate Ceratium gravidum (Photo : Sophie Marro)

Tunicata Pyrosoma  (Photo : Fabien Lombard)

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)

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

Mollusk  (Photo : Fabien Lombard)