Book excerpt: This book comprehensively reviews the immunology of fish--their health, interactions between them and their pathogens, and the impact of both endogenous and environmental changes on these interactions. Leading authorities provide an essential foundation for the understanding of fish immunology and fish health.As fish are increasingly used as model systems for vertebrate immune systems, The Fish Immune System will be a crucial reference. - The only comprehensive, single-volume reference on the fish immune system - Contributions from an international team of experts - Useful to researchers interested in fish health as well as professionals managing fish hatcheries, aquariums, and other facilities that must maintain healthy fish