Quizz the ocean seasons

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

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

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)

Les mésocosmes attirent les poissons ! (© Stareso)

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The seasonal evolution of the chlorophyll a concentration as seen by a « water color » satellite (SeaWifs) in the Atlantic Ocean.

Diatom species Odontella mobiliensis (Photo : Sophie Marro)

Teaching sheets

Ctenaria Beroe ovata (Photo : Fabien Lombard)

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Siphonophores - The longest animals on the planet
Cousins of corals, siphonophores are colonies of specialized individuals called zoids. Some catch and digest their prey, others swim, or lay eggs or sperm.

Dinoflagellate Ceratium tripos (Photo : Sophie Marro)

Instrumented buoy (Photo : Emilie Diamond)

Instrumented buoy (Photo : David Luquet)

Amphipode crustacean (Photo : Fabien Lombard)

Appendicularia Oikopleura dioica (Photo : Fabien Lombard)

World ocean currents map

Gelatinous plankton Mneniopsis (Photo : Fabien Lombard)

Satellite observation (GEOS-12) of Hurricane Katrina in August 2005 in the Gulf of Mexico - Source : NASA-NOAA

Siphonophores (Photo : Fabien Lombard)