Dealing with the practical as opposed to the theoretical aspects of microbiological techniques, this book describes methods for the isolation and characterization of bacteria, fungi, protozoa and viruses from fish and shellfish. It highlights the currently popular serological techniques, and discusses all the up-to-date methods used in fisheries microbiology. Written by experts in the field with many years of practical experience, the plethora of techniques published in diverse journals are discussed and their methods relevant to fish (and shellfish) disease diagnosticians presented. Useful hints are given which will be of special interest to newcomers in the field, and there is comprehensive information on the availability of materials. The study will be of benefit to fish disease diagnosticians, veterinary diagnostic laboratories, fisheries biologists, water authority laboratories, aquatic microbiologists, general microbiologists, and public health scientists.