红扇形海扇珊瑚中的天竺鲷，安达曼海

gonian sea fan coral hosts a small school of cardinalfish (Ostorhinchus sp.) sheltering within its branching framework on an Andaman Sea reef, the fish using the coral's dense structure for refuge and feeding. Gorgonian sea fans are slow-growing octocorals that can live for several decades, their architecture providing microhabitat for crustaceans, juvenile fish and invertebrates across multiple reef trophic levels. 4K, horizontal frame, close-up, scuba diver POV. Ko Haa Archipelago, Andaman Sea, Krabi Province, Thailand.