安达曼海礁墙上的濒危鹿角珊瑚和石斑鱼

n coral (Acropora sp.), listed as Endangered on the IUCN Red List, is among the fastest-growing hard corals on Indo-Pacific reefs yet among the most vulnerable, with global populations declining sharply due to coral bleaching, ocean acidification and physical disturbance. Here we see a healthy example displaying new growth, its branching structure provides critical reef habitat: coral grouper (Plectropomus sp.) patrol the surrounding water while smaller reef fish shelter within the colony's framework, a food web that collapses when the coral is lost. 4K, vertical frame, medium shot looking downward, scuba diver POV. Ko Haa Archipelago, Andaman Sea, Krabi Province, Thailand.