PROBLEM TO BE SOLVED: To improve a survival rate by improving a feeding environment of larvae of fishes that are intractable species in seed production.SOLUTION: The larvae of fishes that are intractable species in seed production are bred by LED light with sensible wavelength (tuna larvae by LED light including a green color of 460-610 nm as domain wavelength； yellowtail larvae by LED light including a red color of 530-750 nm as domain wavelength).【課題】難種苗生産魚種仔魚の摂餌環境を改善して生残率を向上させる。【解決手段】難種苗生産魚種の仔魚を感受性の高い波長のＬＥＤ光（マグロ類仔魚は、主波長として４６０～６１０ｎｍの緑色を含むＬＥＤ光；ブリ類仔魚は、主波長として５３０～７５０ｎｍの赤色を含むＬＥＤ光）で飼育する。【選択図】なし
