Here a coral with its large polyps exposed releases sperm into the water. (Photo: Brendan Holland)
We all love the beach in the summer. The sun, the sand, and the surf. But just because we're having fun, doesn't mean we can forget about safety. Get the facts about rip currents in this Ocean Today video.
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Revised: June 22, 2015 | You are here: http://oceanservice.noaa.gov/education/tutorial_corals/media/supp_coral06b.html