This species bears a strong resemblance to Mustard Hill Coral (Orites astreoides) but I'm no expert...
Bahia Honda State Park
Off Loggerhead Beach
Monroe County Florida, USA
Olympus OM-D E-M5 Mark II
Olympus 14-42mm II R Lens
PT-EP13 Underwater Housing,
PPZR-EP02 Lens Port
& 14-42mm Zoom Gear