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)
Instrumented buoy (Photo : David Luquet)
Dinoflagellate Ceratium falcatum (Photo : Sophie Marro)