The stony coral Enallopsammia. The white patches are areas where the coral tissue is dead (the underlying skeleton is white) and other animals, such as barnacles and hydroids have settled.

Image ID: expl2561, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photo Date: 2005 August 20
Credit: North Atlantic Stepping Stones Science Party, IFE, URI-IAO; NOAA/OAR/OER

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