本发明是关于用于培养作为稚仔鱼和甲壳类幼体(以下简称为稚仔鱼)饵料的微小生物(称微小饵料生物)的饵料及其使用方法。对于许多人工孵化生产的鱼类,其最初的饵料是投喂褶皱臂尾轮虫(以下简称轮虫)、牡蛎幼虫、海胆受精卵等。其后,投喂水蚤、多刺裸腹溞、卤虫等。这些都是浮游动物。在稚仔鱼培养中,首先必须要培养 The present invention relates to a bait for culturing a microorganism (called a minute bait organism) which is a bait for juvenile larvae and crustacean larvae (hereinafter referred to simply as juvenile larvae), and a method of using the same. For many hatchery-producing fish, the initial feed was fed on Brachionus plicata (hereinafter referred to as rotifers), oyster larvae, and sea urchin fertilized eggs. Later, feeding Daphnia, Spiny Bared belly, Artemia and other insects. These are zooplankton. In juvenile larval culture, we must first cultivate