五线笛鲷鱼群在泰国珊瑚礁中聚集，竖屏

l of five-lined snapper (Lutjanus quinquelineatus) shelters above a shallow coral reef, their tight schooling behaviour a defence strategy linked closely to reef structure and biodiversity in the Andaman Sea. Snapper species like this depend on healthy hard coral cover for daytime refuge, dispersing at night to feed across the wider reef ecosystem. Their presence in such numbers reflects a reef still capable of supporting complex marine food webs. 4K, vertical, medium shot, scuba diver POV. Andaman Sea, Krabi Province, Thailand.