Dissolved oxygen - mon océan et moi

Annelid worm (Photo : Fabien Lombard)

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)

Jellyfish Aequorea aequorea (Photo : Fabien Lombard)

Elephant seal equipped with a sensor

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

Vue sous-marine d'un groupe de mésocosmes (© Stareso)

Dinoflagellate Ceratium teresgyr (Photo : Sophie Marro)

Acantharia (Photo : Fabien Lombard)

Krill (Photo : Fabien Lombard)

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)