Fish parasites are becoming an increasing problem due to increased focus on aquaculture, fisheries, fish health and food hygienic aspects of fish in general. This book presents a range of classical and modern methods in fish parasitology. Thus, it is described how the reader should collect the fish hosts, isolate the parasites, prepare the material and identify the organisms. This book can be used as a handbook and as a laboratory manual by students of courses in aquaculture, fish health, fish parasitology, general parasitology, fisheries ecology and zoology.