"[Pisces]"
   Class Actinopterygii Woodward, 1891 - ray-finned fishes see Clade Actinopterygii Woodward 1891 [Moore & Near 2020]
     Order Anguilliformes Berg, 1943 - eels
       Family Synaphobranchidae Johnson, 1862 - cutthroat eels
         1 Subfamily Ilyophinae Jordan & Davis, 1891 - arrowtooth eels
         1.0 Subfamily Dysommatinae see Subfamily Ilyophinae Jordan & Davis, 1891
         2 Subfamily Synaphobranchinae Johnson, 1862 - cutthroat eels
         3 Subfamily Simenchelyinae Gill, 1879 - pugnose parasitic eels