top perspective on huge barrel sponge coral xestospongia testudinaria in a tropical deep blue water of andaman sea

andaman animal aquatic barrel below colourful coral corals dive diving environment exotic fauna fish fishes garden islands life marine natural nature ocean open paradise perspective pristine reef reefs riffs scenery scenic scuba sea seascape similan soft sponge surin testudinaria thailand top travel tropical undersea underwater view water wildlife xestospongia