[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 Perciformes Bleeker, 1859 - perches
         Family Zoarcidae Swainson, 1839 - eelpouts
           Genus Zoarces Cuvier, 1829
             Zoarces viviparus (C. Linnaeus, 1758) - viviporous eelpout