[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Pisces
     Class Osteichthyes Huxley, 1880 - bony fishes and tetrapods see Clade Osteichthyes Huxley 1880 [Moore & Near 2020]
       Order Anguilliformes Berg, 1943 - eels
         Family Derichthyidae Gill, 1884 - longneck eels
           Genus Derichthys Gill, 1884
             1 Derichthys serpentinus Gill, 1884 - narrownecked oceanic eel