Back أخطبوط سباعي الأذرع Arabic اخطبوط سباعى الاذرع ARZ Haliphron atlanticus Bulgarian Haliphron atlanticus CEB Haliphron atlanticus Spanish هفتپا Persian Haliphron atlanticus French תמנון שבע הזרועות HE Haliphron atlanticus Italian カンテンダコ Japanese
| Seven-arm octopus | |
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| Ventral view of young female (70 mm ML) | |
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| Lateral view of young male | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Octopoda |
| Family: | Alloposidae Verrill, 1881 |
| Genus: | Haliphron Steenstrup, 1861 |
| Species: | H. atlanticus
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| Binomial name | |
| Haliphron atlanticus Steenstrup, 1861[2]
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| Synonyms | |
The seven-arm octopus (Haliphron atlanticus), also known as the blob octopus or sometimes called septopus, is one of the two largest known species of octopus; the largest specimen ever discovered had an estimated total length of 3.5 m (11 ft) and mass of 75 kg (165 lb).[3][4] The only other similarly large extant species is the giant Pacific octopus, Enteroctopus dofleini.
The genera Alloposina (Grimpe, 1922), Alloposus (Verrill, 1880) and Heptopus (Joubin, 1929) are junior synonyms of Haliphron, a monotypic genus in the monotypic family Alloposidae, part of the superfamily Argonautoidea in the suborder Incirrata of the order Octopoda.[2]
- ^ Allcock, L. (2014). "Haliphron atlanticus". IUCN Red List of Threatened Species. 2014: e.T163207A983527. doi:10.2305/IUCN.UK.2014-3.RLTS.T163207A983527.en. Retrieved 19 November 2021.
- ^ a b Julian Finn (2017). "Haliphron Steenstrup, 1859". World Register of Marine Species. Flanders Marine Institute. Retrieved 5 February 2018.
- ^ O'Shea, S. (2002). "Haliphron atlanticus — a giant gelatinous octopus" (PDF). Biodiversity Update. 5: 1.
- ^ O'Shea, S. (2004). "The giant octopus Haliphron atlanticus (Mollusca : Octopoda) in New Zealand waters". New Zealand Journal of Zoology. 31 (1): 7–13. doi:10.1080/03014223.2004.9518353. S2CID 84954869.