Finfish is the least costly animal protein to produce and is the primary source of protein in most developing countries. In recent years the catch-fish industry has declined significantly, and cage culture is now widely used to raise both warm and cold water fishes. Due to the close proximity of other fish, aquatic organisms, pollutants and water borne pathogens, cage culture fish are especially susceptible to disease. This book is a practical reference to infectious and noninfectious diseases of cold and warm water finfish in cage culture. It is designed for aquaculturists who use cage culture, and also for fish health consultants, fish pathologists, and researchers in diagnostic laboratories.