A year from the Arctic

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Sea Urchin - Planktonic Origins
Barely visible to the naked eye, sea urchin larvae grow and transform into bottom-dwelling urchins.

Mollusk (Photo : Fabien Lombard)

Diatom genus Rhizosolenia (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)

Dinoflagellate Ceratium macroceros var macroceros (Photo : Sophie Marro)

Instrumented buoy (Photo : David Luquet)

Gelatinous plankton Mneniopsis (Photo : Fabien Lombard)

Instrumented buoy (Photo : David Luquet)

Large rosette sampler used in the "World Ocean Circulation Experiment". This rosette has 36 10-liter Niskin bottles, an acoustic pinger (lower left), an "LADCP" current profiler (yellow long tube at the center), a CTD (horizontal instrument at the bottom), and transmissometer (yellow short tube at the center). (Photo : L. Talley)

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Dinoflagellate Ceratium gravidum. In the video one can observe the movement of one of the two flagella. (Video : Sophie Marro)

Jellyfish Aequorea aequorea (Photo : Fabien Lombard)

Siphonophores (Photo : Fabien Lombard)

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Les Dinoflagellés - Ceratium hexacanthum
chaîne de Ceratium hexacanthum qui restent les uns à la suites des autres au fur et à mesure des divisions.
Le mouvement des flagelles est bien visible.

Instrumented buoy (Photo : Emilie Diamond)

Rosette for collecting seawater samples

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This video describes how to perform the Ludion experiment and explains the physical processes involved.

Surface chlorophyll a concentration in the global ocean.

Jellyfish Leuckaztiara octona (Photo : Fabien Lombard)