Arten kan bli upp till 3,5 meter lång. I normalfallet lever den på djupt vatten i Atlanten. Under 2025 gjordes två fynd, men innan dess hade den endast observerats vid fyra tillfällen i Skandinavien.
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↑Robson, G. C. (1930) Cephalopoda, I. Octopoda, Discovery Reports, 2
12345Kristensen, T. K. and J. Knudsen (1983) A catalogue of the type specimens of Cephalopoda (Mollusca) in the Zoological Museum, University of Copenhagen, Steenstrupia, 9 (10)
↑Joubin, L. (1929) Notes preliminaires dur les Cephalopodes des croisieres du DANA (1921-1922). Octopodes - 2e Partie, Annals de l'Institut Oceanographique, (new series) 7 (1)
↑Robson, G. C. (1932) , A Monograph of the Recent Cephalopoda. Part II. The Octopoda
↑Ijima, I. and S. Ikeda (1902) Notes on a specimen of Amphitretus obtained in the Sagami Sea, Annotationes Zoological Japanenses, 4 (3)
↑Roper, C. F. E. and M. J. Sweeney (1978) , A catalog of the type-specimens of Recent Cephalopoda in the National Museum of Natural History. Smithsonian Contributions to Zoology, 278
↑Verrill, A. E. (1880) Notice of the remarkable marine fauna occupying the outer banks off the southern coast of New England, American Journal of Science, (series 3) 20 (41)
↑Sweeney, M. J. and C. F. E. Roper / N. A. Voss, M. Vecchione, R. B. Toll and M. J. Sweeney, eds. (1998) Classification, type localities and type repositories of recent Cephalopoda, Systematics and Biogeography of Cephalopods. Smithsonian Contributions to Zoology, 586 (I-II)
↑Steenstrup, J. (1861) Foreviste derpaa en Afdeling af Museets seneste Forogelser af Blaeksprutteklassen, saerligen Octopodformer fra Middelhavet, og gav Bemaerkninger om de enkelte Arter, fornemlig efter det Veranyske Cephalopodvaerk, Videnskabelige Meddekekser fra deb Naturhistoriske Forening i Kjobenhavn, 1860