PROBLEM TO BE SOLVED: To emit light according to visual sensitivity of fishes.SOLUTION: A fish preserve 1 for culturing fishes is provided with light emission elements 6a, 6b, 6c for emitting at least two types of lights having peak wavelengths of the light emission different by 5 nm or more with one another in a range from 400 nm to 570 nm.COPYRIGHT: (C)2013,JPO&INPIT【課題】魚の視感度に合せて光を放射する。【解決手段】魚を養殖する生簀1に、400nm~570nmの範囲において、発光ピーク波長が互いに5nm以上異なる少なくとも2種類の光を放射する発光素子6a,6b,6cを備える。【選択図】図1