Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Unikonta |
| system | Opisthokonta Cavalier-Smith, 1987 |
| kingdom | Animalia Linnaeus, 1758 - animals |
| subregnum | Eumetazoa Butschli, 1910 |
| divisio | Bilateria Hatschek, 1888 |
| subdivisio | Protostomia Grobben, 1908 - protostomes |
| phylum | Mollusca Cuvier, 1795 - mollusks |
| subphylum | Conchifera Gegenbaur, 1878 - shell-bearers |
| superclassis | Cyrtosoma |
| class | Cephalopoda Cuvier, 1795 - cephalopods |
| subclass | Coleoidea Bather, 1888 |
| cohors | Neocoleoidea Haas, 1997 |
| superorder | Octobrachia Fioroni, 1981 |
| order | Octopoda Leach, 1818 |
| suborder | Incirrina Grimpe, 1916 |
| family | Octopodidae D'Orbigny, 1840 |
| subfamily | Octopodinae D'Orbigny, 1840 |
| genus | Octopus Cuvier, 1797 - octopus |
| subgenus | Octopus Cuvier, 1797 |
| species | Octopus roosevelti Stuart, 1941 - Krake |
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