Abstract
It is now known that a lineage of cnidarians diverged to become endoparasites, which compose the subphylum Myxozoa. This subphylum contains about 2,500 species, which are distributed in the classes Myxosporea and Malacosporea. Myxosporeans contain the vast majority of myxozoan species currently known, and their members infect various tissues and organs of vertebrates, mainly fish, but als…