Myxiniformes

order of chordates Myxiniformes (Myxiniformes) is an order comprising closely related families of organisms. It contains 1 families with 26 known species. This includes the family groups Myxinidae. Among its members, 2 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Myxini (Myxini).