An object of the present invention is to provide a farmed fish or caught wild fish of a "fatty" state having satisfactory taste and texture by increasing the intramuscular lipid content of the farmed fish or caught wild fish for shipping the fish, and to provide a fish-rearing feed therefor. The object of the present invention is attained by providing farmed fish of a "fatty" state increased in intramuscular lipid content thereof by: preparing a fish-rearing feed for increasing the intramuscular lipid content of the fish, by satisfying the requirement of the amino acid necessary for fish growth with respect to the essential amino acids except lysine in a fish-rearing feed containing the essential amino acid requirements (necessary for fish growth) and adjusting the content of lysine (of the essential amino acids) in the feed to be equal to or less than the amino acid requirement (necessary for growth) and rearing fish while giving the fish-rearing feed during a period of 2 to 7 days before shipment within the rearing period (before shipment) for the farmed fish.
