PROBLEM TO BE SOLVED: To provide a fish breeding feed having an excellent effect of preventing infections.SOLUTION: The present invention provides a fish breeding feed containing 4 wt.% or less of water-soluble polysaccharides that do not have a substituent except a hydroxy group. The present invention provides a fish breeding feed containing a cellulose acetate with a total degree of acetyl substitution of 0.4 or more and 1.4 or less.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】感染症予防効果に優れる魚類飼育用飼料を提供することを目的とする。【解決手段】ヒドロキシ基以外の置換基を有しない水溶性多糖類を４重量％以下含有する、魚類飼育用飼料。アセチル総置換度が０．４以上１．４以下の酢酸セルロースを含有する、魚類飼育用飼料。【選択図】なし
