Les Dinoflagellés - Ceratium gravidum Ceratium gravidum dont en voit parfaitement les mouvements d’un des deux flagelles.
Deployment of a profiling float (Photo : Jean-JacquesPangrazi)
Dinoflagellés Ceratium massiliense var protuberans (Photo : Sophie Marro)
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)