This answer refers to coral reefs that display higher coral cover plus the continued dominance of the original species that dominated or were well represented in the past of the reefs. E.g. Acropora palmata in reef crests, and Orbicellas, Montastraeas, Agaricias, etc. and thus were not substituted for oportunistic species as Millepora complanata, Siderastrea siderea, Porites astreoides, for example.