珊瑚礁退化：安达曼海死扇珊瑚上的红藻蓝细菌

roalgae (Rhodophyta spp.) grips the broken stumps of a gorgonian sea fan coral in close detail on this Andaman Sea reef wall, its texture visible against bare skeleton left behind. A small striped reef fish drifts past in blue water, life moving through spaces once occupied by structurally complex coral. Once macroalgae establishes over dead coral, it can persist for years, blocking coral larvae from settling and slowing recovery of the colony. 4K, wide angle, close up, scuba diver POV. Andaman Sea, Krabi Province, Thailand.