Research workers, instructors, and students have long expressed the need for a comprehensive reference book dealing with fish pathology. Now, with these published proceedings of the first international conference ever held on comparative pathology, all in the field—fisheries biologists, comparative microbiologists, veterinary scientists, hygienists, parasitologists, toxicologists, and comparative pathologists—at last have a dependable and thorough reference, the first in the English language devoted primarily to the lesions of disease in fish. Following an introductory chapter on comparative fish histology, the volume’s 38 specific chapters are grouped under six major headings: specific diseases; diseases of a species; lesions of organ systems; chemical and physical agents of disease; nutritional disease; and neoplasia. More than 450 illustrations, including many photomicrographic enlargements, elucidate the text.