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)
Elephant seal equipped with a sensor
Dinoflagellate Ceratium pentagonum var robustum (Photo : Sophie Marro)
Les Dinoflagellés - Ceratium hexacanthum chaîne de Ceratium hexacanthum qui restent les uns à la suites des autres au fur et à mesure des divisions. Le mouvement des flagelles est bien visible.
Annelid worm (Photo : Fabien Lombard)
Gelatinous plankton salpes and Beroe(Photo : Fabien Lombard)
Ocean color satellites travel around the Earth at an altitude of about 700 to 800 km.
