Fishes Class Myxini (Jaekel, 1911) see Subclass Myxinoidea Order Myxiniformes - hagfishes Family Myxinidae Rafinesque, 1815 - hagfishes Subfamily Eptatretinae Genus Hexatrema Girard, 1855, nom. inval. see Genus Eptatretus Cloquet, 1819