泰国安达曼海，健康的角柱海扇珊瑚在礁石壁上摇曳

gorgonian sea fan coral sways in the current on a reef wall, its branching lattice showing healthy growth with no visible bleaching or algae overgrowth. Gorgonian fans grow perpendicular to prevailing currents, orienting branches to maximise plankton flow past thousands of tiny feeding polyps. Slow growing and fragile, these corals take decades to mature, making a healthy young colony like this a marker of stable reef conditions. 4K, horizontal, close up, scuba diver POV. Ko Haa Archipelago, Andaman Sea, Krabi Province, Thailand.