back button photo of coral bleaching

72 dpi image

Bleaching occurs when coral become stressed by heat, cold, chemicals, or other factors. When corals are stressed they expel the symbiotic zooxanthellae (algae) that live inside their tissues and give the coral its color when alive.
(This copyrighted image is used by permission of the photographer and not intended for any type of commercial/non-profit use. Please contact Kip Evans at for more information.)

NOAA logo Revised January 12, 2006 by Sanctuaries Web Group
Many links leave the National Marine Sanctuary Web Site - please view our Link Disclaimer for more information
National Ocean Service | National Oceanic and Atmospheric Administration | Privacy Policy | Contact Us