安达曼海，红色海藻覆盖在破碎的角状海扇基座上

roalgae (Rhodophyta spp.) blankets the broken base of a gorgonian sea fan coral on this Andaman Sea reef wall, all that remains of a once-established colony reduced to bare stumps. Macroalgae overgrowth follows coral mortality, colonising exposed skeleton and outcompeting new coral recruitment. Gorgonian fans are slow-growing, taking decades to reach this former size, making the loss hard to recover from. Copy space in blue water, left. 4K, wide angle, horizontal medium shot, scuba diver POV. Andaman Sea, Krabi Province, Thailand.