赤潮是一种全球性海洋灾害，近20年来，赤潮的危害日趋严重，受到了许多沿海国家和地区的关注，现已列为国际减灾十年计划的内容之一。一、赤潮及其成因赤潮是海洋中某些微小生物的暴发性繁殖或高密度聚集而引起海水变色现象的总称。渔民俗称之为“铁锈水”、“臭水”、“牛粪 Red tide is a kind of global ocean disaster. Over the past 20 years, the harm of red tide has become increasingly serious and has attracted the attention of many coastal countries and regions. It has been listed as one of the contents of the International Decade of Reducing Disasters. First, the red tide and its causes Red tide is the general term for the phenomenon of sea water discoloration caused by outbreaks or high-density aggregation of some tiny organisms in the ocean. Fishermen commonly known as “rust water”, “stinky water”, "cow dung