PROBLEM TO BE SOLVED: To provide feed for culturing marine animals, the feed having high feed-intake promotion effect and growth promotion effect on cultured marine animals including such as sweetfish； and a culturing method using the feed.SOLUTION: The invention provides feed for culturing marine animals, the feed containing a fermentation product or decomposition product of raw material derived from marine animals, where fish intestines of marine animals of the same type as those which are cultured are used as the raw material. It is preferable that the fermentation product or decomposition product of the raw material is contained in an approximate amount of 0.01-10 wt.% to the feed for culturing marine animals. The product obtained by fermenting or decomposing the raw material may be filtrated to be a liquid body or semi-liquid body.【課題】 アユ等の養殖魚介類に対して摂餌促進効果及び成長促進効果の高い養殖魚介類用飼料及びこれを用いた養殖方法を提供する。【解決手段】 魚介類由来の原料の発酵物又は分解物を含有する養殖魚介類用飼料において、前記原料として養殖する魚介類と同一種類の魚介類の魚腸を用いた養殖魚介類用飼料である。前記原料の発酵物又は分解物は、養殖魚介類用飼料に対して０．０１重量％～１０重量％程度含有させるとよい。原料を発酵又は分解させたものを濾過して液状体又は半液状体としてもよい。【選択図】 図５
