glider

Instrumented buoy (Photo : David Luquet)

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Les Dinoflagellés - Ceratium gravidum
Ceratium gravidum dont en voit parfaitement les mouvements d’un des deux flagelles.

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The profiling float

Dinoflagellate Ceratium paradoxides (Photo : Sophie Marro)

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Pelagia - Fearsome Jellyfish
Mauve jellies move in droves, their nasty stings feared by swimmers.

Scientists collecting seawater samples from the rosette (Photo : Stacy Knapp, Woods Hole Oceanographic Institution)

Colony of salps Salpa fusiformis (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)

Surface chlorophyll a concentration in the global ocean.

Dinoflagellés Ceratium massiliense var protuberans (Photo : Sophie Marro)

Mollusk (Photo : Fabien Lombard)

Teaching sheets

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Diatoms - Life in glass houses
Champions of photosynthesis, these unicellular organisms appeared at the time of dinosaurs.They produce a quarter of the oxygen we breathe.

Dinoflagellate Ceratium arietinum var arietinum (Photo : Sophie Marro)

Deployment of a profiling float (Photo : Jean-Jacques Pangrazi)

Jellyfish Rhizostoma pulmo (Photo : Fabien Lombard)

Jellyfish Pelagia noctilica (Photo : Fabien Lombard)

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Drifting profiling floats in the Atlantic