Stock Photo - This Envisat image, 2008 with the Medium Resolution Imaging Spectrometer, captures a plankton bloom stretching across the Northeast Passage in the Barents Sea. Plankton, the most abundant type of life found in the ocean, are microscopic marine plants that drift on or near the surface of the sea.

Stock Photo: This Envisat image, 2008 with the Medium Resolution Imaging Spectrometer, captures a plankton bloom stretching across the Northeast Passage in the Barents Sea.

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