Parasitic Diseases of Fish

This Reprint compiles a series of expertly crafted chapters originally published in the Special Issue of the journal Pathogens by MDPI, offering a comprehensive exploration of various aspects of parasitic diseases in fish. The volume spans a broad spectrum of parasitic groups, including protozoans, dinoflagellates, myxozoans, trematodes, copepods, and leeches, providing in-depth analyses of each group’s unique challenges and the latest research findings. Readers will gain valuable insights into the identification of specific parasites, the intricate dynamics of host–parasite interactions, and the cutting-edge molecular techniques used to unravel these complex relationships. Beyond the biological and ecological aspects, the Reprint also addresses the impact of environmental factors on parasitic infections, offering a holistic perspective on disease management in aquaculture. It highlights innovative approaches, including molecular biology and phytotherapy, aimed at mitigating the effects of parasitic diseases and enhancing fish health.