Proceedings of the Royal Society B: Biological Sciences
Restricted access

First-ever observations of a live giant squid in the wild

Published:https://doi.org/10.1098/rspb.2005.3158

    The giant squid, Architeuthis, is renowned as the largest invertebrate in the world and has featured as an ominous sea monster in novels and movies. Considerable efforts to view this elusive creature in its deep-sea habitat have been singularly unsuccessful. Our digital camera and depth recorder system recently photographed an Architeuthis attacking bait at 900 m off Ogasawara Islands in the North Pacific. Here, we show the first wild images of a giant squid in its natural environment. Recovery of a severed tentacle confirmed both identification and scale of the squid (greater than 8 m). Architeuthis appears to be a much more active predator than previously suspected, using its elongate feeding tentacles to strike and tangle prey.

    References

    • Aldrich F.A. 1991Some aspects of the systematics and biology of squid of the genus Architeuthis based on a study of specimens from Newfoundland waters. Bull. Mar. Sci. 49, 457–481. ISIGoogle Scholar
    • Aoki, K., Amano, M., Yoshioka, M. & Mori, K. 2004 Differences in the diving behavior of sperm whales between Kii Peninsula and Ogasawara Islands. Abstract submitted to the 2004 conference of Japanese Mammalogical Society, Tokyo Agricultural University, Atsugi Tokyo, October 8–11 2004. (In Japanese). Google Scholar
    • Carlini D.B& Graves J.E. 1999Phylogenetic analysis of cytochrome c oxidase I sequences to determine higher-level relationships within the coleoid cephalopods. Bull. Mar. Sci. 64, 57–76. ISIGoogle Scholar
    • Clarke M.R. 1969A review of the systematics and ecology of oceanic squid. Adv. Mar. Biol. 4, 91–300. Crossref, ISIGoogle Scholar
    • Clarke M.R, Denton E.J& Gilpin-Brown J.B. 1979On the use of ammonium for buoyancy in squids. J. Mar. Biol. Assoc. UK. 59, 259–276. Crossref, ISIGoogle Scholar
    • Förch E.C. 1998The marine fauna of New Zealand: Cephalopoda: Oegopsida: Architeuthidae [Giant squid]. NIWA Biodiv. Mem. 110, 1–113. Google Scholar
    • Hanlon R.T& Messenger J.B. 1996pp. 166–168. Eds. Cambridge, UK:Cambridge University Press. Google Scholar
    • Kano Y& Kase T. 2004Genetic exchange between anchialine-cave populations by means of larval dispersal: the case of a new gastropod species Neritilia cavernicola. Zool. Scripta. 33, 423–437.doi:10.1111/j.0300-3256.2004.00159.x. . Crossref, ISIGoogle Scholar
    • Kubodera, T. 2004 Studies on systematic and phylogeny of giant squid, Architeuthis, around Japanese waters. Report of JSPS Grand-in-Aid for Scientific Research, 2001–2003 (13660197), pp. 1–15. (In Japanese.). Google Scholar
    • Mori K. 1997Sperm whales in Ogasawara. Megaptera. 21, 3(In Japanese.). Google Scholar
    • Mori, K., Abe, H., Suzuki, M. & Kubodera T. 1999 School structure, distribution and food habits of sperm whales near the Ogasawara Islands, Japan. 13th Biennial Conf. on the Biology of Marine Mammals Abstracts, p. 130. Google Scholar
    • Nixon M& Young J.Z. 2003pp. 1–392. Eds. Oxford, UK:Oxford University Press. Google Scholar
    • Norman M. 2000pp. 1–320. Eds. Hackenheim:Conch Books. Google Scholar
    • Okiyama MKinds, abundance and distribution of oceanic squids in the Sea of Japan. Recent advances in cephalopod fisheries biology, Okutai T, O'Dor R.K& Kubodera T. 1993pp. 403–451. Eds. Tokyo:Tokai University Press. Google Scholar
    • Roeleveld M.A.C& Lipinski M.R. 1991The giant squid Architeuthis in southern African waters. J. Zool. Lond. 224, 431–477. Crossref, ISIGoogle Scholar
    • Roper C.F.E& Booss K.J. 1982The giant squid. Sci. Am. 246, 96–105. Crossref, ISIGoogle Scholar
    • Watanabe Y, Mitani Y, Sato K, Cameron M.F& Naito Y. 2003Dive depths of Weddell seals in relation to vertical prey distribution as estimated by image data. Mar. Ecol. Prog. Ser. 252, 283–288. Crossref, ISIGoogle Scholar