众所周知,人和陆生动物都会生病,那么生活在水中的鱼类是否也会生病呢?回答是肯定的。鱼和其他陆生动物一样,如果体质衰弱、营养不良、体表损伤,一遇到环境恶化,病菌入侵或寄生虫寄生等情况就会生病。在天然水域中的病鱼,因其体弱且常常离开鱼群,往往成为凶猛鱼类或其他水生动物的食物或在自然水域中悄然死去,不易被人发现。近几年来,世界各地相继发展鱼类人工养殖事 It is well-known that both humans and terrestrial animals will get sick, so are fish living in the water sick? The answer is yes. Like other terrestrial animals, fish can become ill if they are in poor health, malnutrition, body surface damage, exacerbation of the environment, invasion of pathogens or parasitic parasites. Diseased fish in natural waters, which are infrequently and often left of fish stocks, often become ferocious fish or other aquatic food, or quietly die in natural waters, making them hard to detect. In recent years, fish farms have been developed around the world