Dinoflagellate Ceratium gravidum (Photo : Sophie Marro)
Rosette used to collect seawater samples during a scientific cruise in the South Pacific Ocean. Duringthe austral summer,the amount of chlorophyllais so low thatthe water becomesdeepblue,almostpurple. (Photo : Joséphine Ras)
Dinoflagellate Ceratium teresgyr (Photo : Sophie Marro)
Dinoflagellates Ceratium platycorne var platycorne (Photo : Sophie Marro)
Elephant seal equipped with a sensor
Instrumented buoy (Photo : David Luquet)
Ocean color satellites travel around the Earth at an altitude of about 700 to 800 km.