Grooved Brain Coral (Diploria labrynthiformis)

Forming round boulders, colonies have deep interconnected valleys that contain polyps along with broad ridges that have wide, trough-like grooves running down the middle. The grooved brain coral appears tan, yellow-brown, or brownish gray. Commonly inhabiting the seaward slope of the reef, it ranges from 15-50 feet (4.6-15.2 m) in depth.

Clubbed Finger Coral (Porites porites)

 

Inhabiting most areas of the reef to depths of 160 feet (48.8 m), the finger coral has clumps of smooth, short branches with swollen ends. The clubbed finger coral is beige, yellow-brown, brown, or gray with a purple tint in coloration. It is commonly found at the back reef, although much larger specimens may be found on the fore reef zone.