珊瑚生物侵蚀：特写镜头显示扳机鱼在硬珊瑚上留下的喂食痕迹

feeding scar left in hard coral by titan triggerfish predation, the fish itself already gone from the frame - this bioerosion exposes invertebrates and detritus that would otherwise stay hidden, extending a food source to smaller reef fish that could not access it unaided. Over time, this kind of coral predation plays a measurable role in reef nutrient cycling and food chain support. 4K, wide angle, vertical close up, high angle, scuba diver POV. Andaman Sea, Krabi Province, Thailand.