There is some selective water temperature range in f ishes. Fishes keep up the same direction with water temperature variety in temperature selection.The seletive temperature of warm species tends to higher temperature than that of temperate species. If temperature goes up faster or temparature of fish adapted was lower, selective temperature of these f ishes tend to lower. Seletive temperature of main species fished is 1- 3 e higher than the median temperature of that month, 1 - 2 e higher in the majority of species. Variable range of selective temperature in main species is mainly 2- 6 e , 3- 5 e . Selective temperature in main species f ished is 20- 24 e in winter and spring , 26- 29 e in summer and autumn.