Malachite Green ( MG) is a kind of anti-parasitic and anti-bacterial drug that has been widely used in the aquaculture for the prevention and the treatment of diseases of aquatic animals, such as water mildew, gill phthiriasis, etc, and gets good results. 孔雀石绿(MG)是一种抗寄生虫和抗细菌类药物,广泛应用于水产养殖业,用于预防与治疗各类水产动物的水霉病、鳃霉病等,并获得了极佳的效果。