PROBLEM TO BE SOLVED: To provide a food / beverage, a feed, or a feed, which uses a modified alga excellent in digestibility. SOLUTION: The food, drink, feed or feed containing algae in which the expression of at least one protein selected from the group consisting of cellulose synthase and polyketide synthase involved in alginane synthesis is reduced or lost. [Selection diagram] None【課題】消化性に優れた藻類改変体を用いた、飲食品、飼料、又は餌料の提供。【解決手段】セルロース合成酵素及びアルジナン合成に関与するポリケチド合成酵素からなる群より選ばれる、少なくとも１つのタンパク質の発現が低下又は喪失している藻類を含む、飲食品、飼料、又は餌料。【選択図】なし
