The stony coral Enallopsammia. The white patches are areas where the coraltissue is dead (the underlying skeleton is white) and other animals, such asbarnacles and hydroids have settled.
4/10/2019 1:04:45 PM
Date: 2005 August 20
Credit: North Atlantic Stepping Stones Science Party, IFE, URI-IAO; NOAA/OAR/OER