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黑鱼即乌鳢亦称“乌鱼”。硬骨鱼纲,月鳢科。为淡水经济鱼类。亲鱼培育亲鱼来自干塘收集或市场选购。先不分雌雄在池中混养,4月份专塘培育,2～3天投喂1次小鱼虾、蝌蚪、豆饼、米糠。雌性腹部灰白色、膨大松软,生殖孔突出、稍红而圆,腹鳍条灰白色;雄鱼腹部较小、蓝黑色,生殖孔微凹似三角形,腹鳍黑色。雄鱼比雌鱼体色黑而鲜艳。催产孵化催产可侄孵化缸、土池、催产池中进行。激素用HCG(绒毛膜促性腺激素)和LRH(类似物)两种,分两次胸腔注射。催产剂量为雌鱼每公斤体重用LRH40～90微克、HCG200～450国际单位混合,雄鱼用量为雌鱼的50～70%。
The black fish that is also known as black tiger “mullet ”. Echinodermata, Moonfly Branch. For freshwater economic fish. Broodstock parent broodstock collected from the dry pond or the market. First, regardless of male and female polyculture in the pool, April pond cultivation, 2 to 3 days feeding 1 small shrimp, tadpoles, bean cake, rice bran. Females belly gray, swollen loose soft, prominent genital hole, a little red and round, gray belly white fin; male abdomen smaller, blue-black, reproductive pore micro-concave triangle, pelvic fins black. The males are black and brightly colored than the females. Oxytocin hatch can be nephew incubator cylinder, soil pool, oxytocin in the pool. Hormones with HCG (chorionic gonadotropin) and LRH (analogues) two, in two chest injection. The amount of oxytocin was 40 ~ 90 micrograms of LRH per kilogram of body weight and 200 ~ 450 international units of HCG were mixed with 50 ~ 70% of male fish.