Nichora
NMSAS - Purple Coral Swains Island

NMSAS - Purple Coral Swains Island

National Marine Sanctuaries

Beautiful, brightly colored corals like this striking purple coral paint the tropical reef found at National Marine Sanctuary of American Samoa. But the species responsible for the "painted" colors of coral are actually algae living within the coral, called zooxanthellae.

Credit
NOAA
Licence
Public domain
Original
View at the source
Ocean
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