向日葵珊瑚虫在安达曼海礁石的洋流中伸展摇曳

ra sp. coral (aka Sunflower coral) polyps extend fully and sway in the current in this vertical close frame, their multi-tentacled tips fanning across the frame above the Andaman Sea reef floor. Unlike most hard corals that retract their polyps during daylight hours, Alveopora keeps its polyps extended both day and night, a behaviour that maximises both photosynthesis through its symbiotic zooxanthellae and active suspension feeding from the water column simultaneously. The warm tonal range shifts from copper in the foreground to cooler grey-green at depth. 4K, vertical frame, close up, scuba diver POV. Ko Haa Archipelago, Andaman Sea, Krabi Province, Thailand.