鱼苗鱼种是养成鱼的基础。培育规格大、品种多、数量足的鱼种，是农家经营养鱼生产的一个重要条件。农家如能自己繁殖鱼苗、培育大鱼种，那么饲养成鱼的效益就会大得多。 从鱼苗培育到大规格鱼种，在生产上分２个阶段进行。第１阶段为鱼苗饲养阶段，是指把从卵中孵出的鱼苗饲养 Fish species is the basis for the formation of fish. Cultivating large size, variety and quantity of fish species, is an important condition for farmers to operate fish production. Farmers who breed fry themselves and cultivate large species can benefit far more from keeping fish. From fry breeding to large-scale species, production in two stages. The first stage for the fry feeding stage, refers to the hatchlings hatched from the eggs