Abstract
Fish, in natural or farmed systems, are hosts to a wide diversity of parasites belonging to several taxa. Among the fish parasites, the species belonging to the Phylum Cnidaria, subphylum Endocnidozoa, Class Myxozoa (myxozoans) stand out. Myxozoans are organisms that, as an adaptation to parasitism, have undergone intense simplification and reduction in body size in relation to free-livin…