 Did you know?
Plants in the ocean produce over half the world's oxygen. The most important plants in the ocean are too small to be seen without a microscope. They float near the surface and drift with the currents, so they have been named phytoplankton (phyto=plant, plankton=drifter). Phytoplankton are the 'grass' of the sea. Where they grow there is food for marine animals. Ocean colour tells you how much phytoplankton there is in the water.
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Last update:
17 February 2009
