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Octopus sp Timor.jpg
An octopus species active at night in the coastal waters of northern East Timor
Unidentified octopus from East Scotia Ridge.jpg
An unidentified octopus observed on East Scotia Ridge at a depth of 2,394 m
(scale bar: 10 cm)[1]
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Octopoda
Suborder: Incirrina
Grimpe, 1916 sensu Felley et al., 2001
  • Incirrata
    Grimpe, 1916

Incirrina or Incirrata is a suborder of the order Octopoda. The suborder contains the classic "benthic octopuses," as well as many pelagic octopus families, including the paper nautiluses. The incirrate octopuses are distinguished from the cirrate octopuses by the absence in the former of the "cirri" filaments (found with the suckers) for which the cirrates are named, as well as by the lack of paired swimming fins on the head, and lack of a small internal shell (the "shell" of Argonauta species is not a true shell, but a thin calcite egg case).



  1. ^ Rogers, A. D.; Tyler, P. A.; Connelly, D. P.; Copley, J. T.; James, R.; Larter, R. D.; Linse, K.; Mills, R. A.; Garabato, A. N.; Pancost, R. D.; Pearce, D. A.; Polunin, N. V.; German, C. R.; Shank, T.; Boersch-Supan, P. H.; Alker, B. J.; Aquilina, A.; Bennett, S. A.; Clarke, A.; Dinley, R. J.; Graham, A. G.; Green, D. R.; Hawkes, J. A.; Hepburn, L.; Hilario, A.; Huvenne, V. A.; Marsh, L.; Ramirez-Llodra, E.; Reid, W. D.; Roterman, C. N. (2012). Eisen, Jonathan A., ed. "The discovery of new deep-sea hydrothermal vent communities in the Southern Ocean and implications for biogeography". PLoS Biology 10 (1): e1001234. doi:10.1371/journal.pbio.1001234. PMC 3250512. PMID 22235194.