Jellyfish include any planktonic marine member of the class Scyphozoa (phylum Cnidaria), which is a group of invertebrate animals composed of about 200 described species, or of the class Cubozoa ...

The notion that members of the phylum Myxozoa Grassé, 1970 do not properly belong in classifications of protists has frequently been suggested because the infective spores of these parasites are not ...