<;P>;PROBLEM TO BE SOLVED: To provide living feed for raising flounder which enables favorable growth of flounder and also inhibits abnormal body color of the flounder, and to provide a method for raising flounder with the use of the living feed. <;P>;SOLUTION: The living feed is a rotifier or brine shrimp enriched in nutrient so that fat content, the composition ratio of n3 fatty acid, and the composition ratio of n6 fatty acid are each within a certain range in the presence of glucan and grape polyphenole. The method for raising flounder uses the living feed. <;P>;COPYRIGHT: (C)2011,JPO&INPIT