Here a coral with its large polyps exposed releases sperm into the water. (Photo: Brendan Holland)
Protecting our planet is a group effort that starts with you! Check out this graphic for ten simple things you can do to help protect the Earth.
NOAA's National Ocean Service
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Silver Spring, MD 20910
Revised: April 09, 2015 | You are here: http://oceanservice.noaa.gov/education/tutorial_corals/media/supp_coral06b.html