There are many ways that pollution can damage reefs. Debris like this plastic bag can quickly become entangled on a coral and smother it.
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NOAA's National Ocean Service
N/MB6, SSMC4, Room 9149
1305 East-West Hwy
Silver Spring, MD 20910
Revised: June 22, 2015 | You are here: http://oceanservice.noaa.gov/education/tutorial_corals/media/supp_coral09b.html