泰国石灰岩水下洞穴，红扇形海扇珊瑚遍布

al underwater limestone swim-through, a habitat structure supporting reef biodiversity within Andaman Sea karst formations, with a black and white snapper (Macolor niger) gliding past red gorgonian sea fans inside. Gorgonian corals filter nutrients from passing currents and grow well in shaded cavities, making swim-throughs valuable microhabitats often overlooked outside open reef surveys. The tranquil ambient light captures a quiet, undisturbed pocket of the reef ecosystem. 4K, vertical, medium shot, scuba diver POV. Andaman Sea, Krabi Province, Thailand.