GREEN IS BLACK
Black Sun Coral (Tubastraea micrantha) swaying its polyps at night. Puerto Galera, Mindoro, Philippines
Green sun corals are, confusingly, commonly called 'black sun corals'.
Olympus OMD EM5 MkII, Zuiko 12-50mm Lens in Macro mode, Nauticam Housing, Dual Inon Z-240 Strobes. Settings 1/125, f/18, ISO200