安达曼海珊瑚礁上的绿色和白色美人扇巨藻特写

er of mermaid's fan algae, Udotea, grows across a coral reef surface in the Andaman Sea, some blades a vivid green and others faded pale white where calcium carbonate deposits dominate older tissue. This colour shift reflects the calcification process within the fan shaped blades, part of how this reef algae adds structural sediment to the wider Indo-Pacific reef system. The clump grows directly from coral rock rather than loose sand. 4K, wide angle, horizontal medium shot, scuba diver POV. Andaman Sea, Krabi Province, Thailand.