PURPOSE: To obtain an assorted feed mixed with a non-purified fish oil, capable of being fed to fishes to produce the cultured fishes free from the release of scales, good in appearances and high in commercial values, and not causing the parasitism of pathogenic microorganisms at a wound produced by the release of the scale and the infiltration of the pathogenic microorganisms in the bodies.

CONSTITUTION: The assorted feed is compounded with a non-purified fish oil not subjected to a chemical treatment such as a gum-removing treatment or an acid-removing treatment, and collected from good harvesting lean fishes such as sardines, horse mackerels, mackerels, or mackerel pikes preferably in an amount of 10-30wt.%.