我国海域辽阔 ,江河湖泊众多 ,孕育了丰富的水生生物资源。目前 ,经调查并记录的水生生物物种达 2万多种 ,其中鱼类 386 2种 ,占世界鱼类物种数量的 2 0 %左右。受独特的气候、地理及地质历史等因素的影响 ,我国水生生物具有特有程度高、孑遗物种数量大、生态系统类型齐全等特 China has a vast sea area with many rivers and lakes, which have given birth to abundant aquatic biological resources. At present, there are more than 20,000 species of aquatic organisms investigated and recorded, of which 386 are fish species, accounting for about 20% of the world’s fish species. Due to the unique climate, geography and geological history and other factors, aquatic organisms in our country are characterized by high endemicity, large numbers of relict species and complete ecosystem types