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.
Ocean color satellites travel around the Earth at an altitude of about 700 to 800 km.
Dinoflagellate Ceratium gravidum. In the video one can observe the movement of one of the two flagella. (Video : Sophie Marro)
Phytoplankton bloom observed by the ocean color sensor MODIS onboard NASA satellite Terra in May 2010. The bloom spreads broadly in the North Atlantic from Iceland to the Bay of Biscay - Source : NASA's Earth Observatory (http:/earthobservatory.nasa.gov)
Dinoflagellate Ceratium azoricum (Photo : Sophie Marro)
