Pink Siderastrea sidera, common name massive starlet coral or round starlet cora

Back to front, Colpophyllia, Orbicella, Agaricia.

Colpophyllia is also called Boulder Brain Coral and Large-Grooved Brain Coral

Water is the Cayman Islands was super clear 20m + of visibility!

Colpophyllia natan grows into huge boulders

It's a brain! Diploria labrinthiformas common name Grooved Brain Coral

Close up of Colpophyllia natans. This coral has grooved ridges,