<；P>；PROBLEM TO BE SOLVED: To surely control parasites without using a vinegar, a salt or a chemical not existing in raising environments. <；P>；SOLUTION: This method for controlling parasites comprises enhancing the water temperature of a raising environment 1a for injected fishes A to a prescribed high temperature region H2 to make a temperature environment difficult for the existence of the parasites with a difference between the initial water temperature H1 and the temperature of the high temperature region H2. Thereby, the parasites adhered to the outsides of fish bodies probably escape from the outsides of the fish bodies, such as body surfaces, fins and gills, or die in state adhered to the outsides of the fish bodies. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
