PROBLEM TO BE SOLVED: To provide a feed that can be used in feeding sea urchins, particularly thin sea urchins with fleshless gonad that live in rocky-shore denudation, to grow sea urchins with a high commodity value.SOLUTION: Fucus vesiculosus holdfasts and internal organs of sea urchins, particularly residues, such as a digestive tract, which are generally wasted after the collection of gonads, are mixed and fed.SELECTED DRAWING: Figure 1【課題】本発明は、ウニ、特に磯焼けした海に生息している生殖巣の身入りが悪い痩せたウニを商品価値の高いウニへと畜養する際に用いることのできる畜養飼料を提供する。【解決手段】コンブの付着根およびウニの内臓,特に生殖巣を採取した後に通常は廃棄物となる消化管などの残渣を混ぜ込んだ飼料を給餌する。【選択図】図1