安达曼海海底蓝细菌垫状水华覆盖沙质水下泻湖

ic cyanobacterial mat (BCM) bloom covers a sandy lagoon floor in fine, tube-like formations, replacing what was previously clean open sand at this Andaman Sea dive site. Fuelled by water temperatures several degrees above the seasonal norm over recent months, the mats begin as a fine reddish dust before thickening into raised projections held together by a loose bacterial and sediment matrix that disperses when disturbed. 4K, wide angle, vertical wide shot, copy space. Ko Haa Archipelago, Andaman Sea, Krabi Province, Thailand, filmed in July 2026. Sea temperature recorded at 31 degrees Celsius during this dive.