Phylum Chordata Bateson, 1885 - chordates
Ref: Zoological Record, 1998
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
  Ref: Zoological Record, 1998
     Pisces
    Ref: Zoological Record, 1998
       Class Actinopterygii Woodward, 1891 - ray-finned fishes
      Ref: Zoological Record, 1998
         Order Ophidiiformes Rafinesque, 1810 - cusk-eels
        Ref: Zoological Record, 1998
           Family Aphyonidae - aphyonids
          Ref: Zoological Record, 1998
           Family Bythitidae Gill, 1861 - livebearing brotulas
          Ref: Zoological Record, 1998
           Family Carapidae Jordan & Fowler, 1902 - pearlfishes
          Ref: Zoological Record, 1998
           Family Ophidiidae Jordan & Evermann, 1898 - cuskeels
          Ref: Zoological Record, 1998