Book excerpt: Aquaculture Pathophysiology, Volume I. Finfish Diseases is a diverse, practical reference on finfish diseases impacting aquaculture. It is intended for the veterinarian, fish health biologist or extensionist, fish pathologist and fish health diagnostician supporting the management of major and emerging infectious and non-infectious health risks for the key temperate, subtropical and tropical finfish species of commercial and fisheries importance. This volume should be read in partnership with volume 2 on shellfish diseases as the principles and approach to the diagnosis and management of aquacultured animal species are similar and typically researchers, teachers, students, diagnostic laboratory scientists, aquaculture technicians and farmers need to be competent across both finfish and shellfish health issues. - A focus on the disease process of major or emerging viral, bacterial, fungal, and parasitic infections affecting aquacultured finfish species e.g. salmonids, carp, tilapia, eel, barramundi - A focus on important or emerging environmental, nutritional, genetic, deformity, toxicological, endocrine disruption and neoplastic diseases in finfish - A review of the immunology of finfish relevant to a practical understanding of disease diagnosis and management - An overview of laboratory diagnostic methods relevant to detection of finfish diseases - Concise discussion on the diverse risk factors of finfish diseases and options for their control