PROBLEM TO BE SOLVED: To provide a composition or a livestock feed allowing excellent baiting-induction effect by adding to a live bait or a mixed livestock feed for cultivated fish, facilitation of cultivated fish growth, good health condition, good digestibility and improved livestock feed efficiency.SOLUTION: A composition has, as a substrate, a mixture having a phospholipid composition prepared from a fish crude oil, soy sauce and saccharides, as a main material, where fermentation treatment with a micro-organism used for soy sauce fermentation, specifically a lactobacillus or/and a ferment, is performed.
