Aiming to increase the understanding of the relationship between the aquatic environment and the development of infectious fish diseases, this book applies 22 health maintenance principles of food animal management to aquaculture and discusses how these principles improve the health of cultured fish. Viral and bacterial diseases are organized according to the species, families or groups of fish most affected by the pathogens. The text covers diseases that affect cultured fish in North America,as well as diseases of international concern. It emphasizes the management and therapeutic treatment of diseases