List of colossal squid specimens and sightings

See also: List of giant squid specimens and sightings

This list of colossal squid specimens and sightings is a listing of recorded specimens of Mesonychoteuthis hamiltoni, popularly known as the colossal squid.

Overview

The colossal squid, which has a circumantarctic distribution, is far less known than the distantly related, near-cosmopolitan, giant squid (Architeuthis dux). Nevertheless, a substantial number of colossal squid remains have been recorded; Xavier et al. (1999) collated 188 geographical positions for whole or partial specimens caught by commercial and scientific fisheries. However, very few adult or subadult animals have ever been documented; McClain et al. (2015) stated that only 12 "complete" specimens were known.

List of colossal squid

Records are listed chronologically in descending order and numbered accordingly.

• Date – Date on which the specimen was first captured, found, or observed. In cases where this is unknown, the date the specimen was first reported is listed instead.
• Location – Area where the specimen was found. Given as it appears in the cited references, except where additional information is provided in brackets.
• Oceanic sector – The quadrant of a major ocean in which the specimen was found (see Oceanic sectors).
• Method of capture – Method by which the specimen was recovered or observed. Given as it appears in the cited references, although "washed ashore" encompasses all stranded animals.
• Identification – Species or genus level taxon to which the specimen was originally assigned. Given as it appears in the cited references. Listed chronologically if specimen was re-identified.
• Material cited – Original specimen material that was recovered or observed.
• Material saved – Material that was kept after examination and not discarded (if any).
• Sex – Sex and sexual maturity of the specimen.
• Size and measurements – Data relating to measurements and counts. Abbreviations used are based on standardised acronyms in teuthology (see Measurements), with the exception of several found in older references.
• Repository – Institution in which the specimen material is kept. The acronyms used are those defined by Leviton et al. (1985) and Leviton & Gibbs (1988) (see Repositories). Where the acronym is unknown, the full repository name is listed.
• Cited references – Sources that provide specific data on a particular specimen.
• Additional references – Sources which merely refer to the specimen.
• Notes – Miscellaneous information.

Note: Names of anatomical features are retained from original sources (e.g. jaws may be given instead of the preferred beak).

#	Date	Location	Oceanic sector	Method of capture	Identification	Material cited	Material saved	Sex	Size and measurements	Repository	Cited references	Additional references	Notes
1	1925			From sperm whale stomach	Mesonychoteuthis hamiltoni Robson, 1925	Two arm (brachial) crowns					Robson (1925:272)
2	1956/1957	South Orkney Islands (59°41'S, 44°14'W)	SWA	From sperm whale stomach	Architeuthis sp.; Mesonychoteuthis hamiltoni Robson, 1925	Head and mantle	Undetermined		HL: 30 cm; HW: 20 cm; ED: 16–17 cm; WL?: ~12 m		Korabelnikov (1959:103); Yukhov (1974:62)		Initial identification by I.I. Akimushkin. From 15.8 m long male sperm whale.
3	1956/1957	South Shetland Islands (61°56'S, 52°39'W)	SWA	From sperm whale stomach	Architeuthis sp.; Mesonychoteuthis hamiltoni Robson, 1925	Fin only	Undetermined		FL: 41 cm; FW: 48 cm; WL?: ~10 m		Korabelnikov (1959:103); Yukhov (1974:62)		Initial identification by I.I. Akimushkin. From 15 m long male sperm whale.
4	1970 (reported)				Mesonychoteuthis hamiltoni	Entire	Entire?		ML: 86 mm		McSweeny (1970)	Voss (1980:395, fig. 10b); Clarke (1986:199)	Juvenile specimen. Upper and lower beaks described and illustrated.
5	1975 (reported)				Mesonychoteuthis hamiltoni				"large specimen"; ML unknown		Klumov & Yukhov (1975)	Clarke (1986:199)	Upper and lower beaks described and illustrated.
6	1980 (reported)				Mesonychoteuthis hamiltoni	Entire	Entire?	Female (subadult)	ML: 1250 mm		Voss (1980)
7	1980 (reported)				Mesonychoteuthis hamiltoni	Entire	Entire?		ML: 23 mm		Voss (1980:395, fig. 10c)		Advanced paralarva.
8	1980 (reported)				Mesonychoteuthis hamiltoni	Two partial specimens; brachial crowns	Entire			NMNH	Voss (1980)
9	1981	off Dronning Maud Land, Antarctic at 750–770 m depth		By trawl	Mesonychoteuthis hamiltoni	Entire		Female (immature)	ML: 2.42 m; EL?: 5.1 m		[1]	Ellis (1998:147)	Caught by Soviet trawler Eureka (Эврика). Photographed by Alexander Remeslo.
10	1985 (reported)	at 2000–2200 m depth		Trawled in opening-closing net (RMT8)	Mesonychoteuthis hamiltoni	Entire?			ML: 1.05 m		Rodhouse & Clarke (1985)
11	1986 (reported)	(47°51'S 40°01'W, WH 101 I/76)			Mesonychoteuthis hamiltoni	Lower beak	Entire?	Female (juvenile)	LRL: 7.10 mm; ML: 225.0 mm		Clarke (1986:200, fig. A)
12	1986 (reported)	S. Georgia		From sperm whale stomach	Mesonychoteuthis hamiltoni	Lower beak	Entire?		LRL: 13.50 mm		Clarke (1986:200, fig. B)
13	1986 (reported)	S. Georgia		From sperm whale stomach	Mesonychoteuthis hamiltoni	Lower beak	Entire?		LRL: 20.40 mm		Clarke (1986:200, fig. C)
14	March 2003	Ross Sea		Found floating on surface	Mesonychoteuthis hamiltoni	Entire; recovered in three pieces, later reassembled	Entire	Female (subadult)	ML: ~2.5 m; WL: ~5.4 m; LRL: 37 mm; WT: ~300 kg	Museum of New Zealand Te Papa Tongarewa		Numerous media sources
15	2004 (reported)	"in upper slope waters of the Kerguelen Archipelago"		From stomach contents of 22 sleeper sharks (Somniosus pacificus)	Mesonychoteuthis hamiltoni	89 beaks; 42 lower, 47 upper (minimum number of individuals: 49)	Entire		LRL: 10.1–38.8 mm; LRL(average): 22.3 mm ±7.2; ML(estimate): 61–237 cm; ML(average): 136 cm ±44; WT(estimate): 2.1–91.2 kg; WT(average): 24.4 kg ±22.1		Cherel & Duhamel (2004)		M. hamiltoni beaks were found in 61.1% (22/36) of sleeper sharks examined. Beaks of this species accounted for 16.1% (89/553) of total recovered cephalopod beaks. M. hamiltoni accounted for 52.0% (1133621/2180535 g) of total reconstituted cephalopod biomass.
16	25 June 2005	"South Georgia waters" at 1625 m depth		Caught alive by long-lining fishing vessel; "caught on a number of hooks on a longline" set to target Patagonian toothfish	Mesonychoteuthis hamiltoni	Entire; alive	Head with tentacles and arms; mantle too heavy to bring aboard		WL(estimate): ~5 m; WT (estimate): 150–200 kg		South Georgia Newsletter June 2005		Caught by longliner Isla Santa Clara. Five men, including the ship's scientific observer, attempted to bring the squid aboard. Paul McCarthy, the scientific observer, estimated the length and weight of the squid. Specimen was sent to King Edward Point (KEP) Scientists for formal identification. Two images taken by Ramon Ferreira Gomez.
17	8 January 2007	"near the Ross Ice Shelf"	SWP	Caught by long-lining fishing vessel targeting Patagonian toothfish	Mesonychoteuthis hamiltoni	Entire; alive	None?		ML(estimate?): 12–14 ft		[2], [3]		First recorded sighting of a mature colossal squid. Photographed alive in the water holding onto a Patagonian toothfish.
18	"early February" (captured); 22 February 2007 (reported)	"in the Ross Sea"	SWP	Caught by New Zealand (Sanford Ltd.) vessel San Aspiring while fishing for Antarctic toothfish	Mesonychoteuthis hamiltoni	Entire; alive	Entire	Female	EL(initial estimate): 10 m; EL(after thawing): 4.2 m; ML: ~2.5 m; LRL: 41 mm; EyD(estimate): 30–40 cm; EyD(after thawing): 27 cm; LD: 12 cm; WT: 495 kg	Museum of New Zealand Te Papa Tongarewa	Anderton (2007); [Anonymous] (2007a); Griggs (2007); [Anonymous] (2007b); Black (2008); Atkinson (2008b)	Numerous media sources and website	First mature specimen ever recovered and largest extant cephalopod scientifically documented. Weight initially estimated at 450 kg. Tentacles and eyes shrunk considerably post mortem.
19	28 May 2007 (reported)	New Zealand?	SWP	From a research cruise	Mesonychoteuthis hamiltoni	Two tentacles			ML(estimate): 2 m		[4]
20	20 March 2008 (reported)	Ross Sea	SWP	Caught by New Zealand research vessel Tangaroa	"colossal squid"	Several specimens		Juvenile			Atkinson (2008a)
21	2009 (reported)	Kerguelen waters	SIO	Found in stomach contents of sleeper shark (Somniosus sp.)	Mesonychoteuthis hamiltoni	Lower beak	Entire	(adult)	LRL: 23.6 mm		Xavier & Cherel (2009:55, fig. 10)
22	2009 (reported)	Kerguelen waters	SIO	Found in stomach contents of sleeper shark (Somniosus sp.)	Mesonychoteuthis hamiltoni	Lower beak	Entire	(juvenile)	LRL: 10.4 mm		Xavier & Cherel (2009:56, fig. 10)
23	2009 (reported)	Kerguelen waters	SIO	Found in stomach contents of sleeper shark (Somniosus sp.)	Mesonychoteuthis hamiltoni	Upper beak	Entire		URL: 27.7 mm		Xavier & Cherel (2009:86, fig. 10)
24	2 April 2012 (reported; found in previous week)	off Portland, Victoria, Australia	SWP	Found floating at surface, dead	"colossal type [squid]"	Entire?			ML?("body"): ~2 m; MW?: ~1 m; WT: 120 kg		Collins (2012)		Found by local fisherman and boat operator Bob McPherson while fishing for tuna in waters 700 m deep.
25	2014	Ross Sea at 1200–1800 m depth	SWP	Caught by New Zealand (Sanford Ltd.) vessel San Aspiring while fishing for Patagonian toothfish	"colossal squid"	Entire	Entire	Female	EL: 3.5 m; WT: 350 kg; EyD: 35 cm	Museum of New Zealand Te Papa Tongarewa	Farquhar (2014)		Dissected on 16 September 2014 (eye lens and buccal mass removed); caught "a couple of months" earlier. Dissection led by Kat Bolstad and carried out by staff of Museum of New Zealand Te Papa Tongarewa with help of Auckland University of Technology. Dissection was live streamed over YouTube for 3.5 hours.

Abbreviations

The following abbreviations are used in the List of colossal squid table.

Oceanic sectors

M. hamiltoni has a circumpolar Antarctic distribution.

• SWA, Southwest Atlantic Ocean
• SEA, Southeast Atlantic Ocean
• SWP, Southwest Pacific Ocean
• SEP, Southeast Pacific Ocean
• SIO, Southern Indian Ocean

Measurements

Abbreviations used for measurements and counts are based on standardised acronyms in teuthology, primarily those defined by Roper & Voss (1983), with the exception of several found in older references.

• ED, egg diameter
• EL, "entire" length (end of tentacle(s), often stretched, to posterior tip of tail; in contrast to WL, measured from end of arms to posterior tip of tail)
• EyD, eye diameter
• FL, fin length
• FW, fin width
• HL, head length (most often base of arms to edge of mantle)
• HW, head width
• LD, lens diameter
• LRL, lower rostral length of beak
• ML, mantle length (used only where stated as such)
• MW, maximum mantle width (used only where stated as such)
• WL, "whole" length (end of arms, often damaged, to posterior tip of tail; in contrast to EL, measured from end of tentacles to posterior tip of tail)
• WT, weight

Repositories

Institutional acronyms are those defined by Leviton et al. (1985) and Leviton & Gibbs (1988). Where the acronym is unknown, the full repository name is listed.

• NMNH, National Museum of Natural History, Smithsonian Institution, Washington, District of Columbia, United States

Images

The number directly below each image corresponds to the specimen or sighting, in the List of colossal squid, that the image depicts. The date on which the specimen was first captured, found, or observed is also given.

• 
  Specimen caught off South Georgia Island on June 25, 2005. (25/6/2005)
• 
  Colossal squid sighted near the Ross Ice Shelf on January 8, 2007. First recorded sighting of a mature colossal squid. (8/1/2007)

Videos

As of 2019, a live colossal squid has never been recorded on video or actively observed in its natural habitat, although a number of video recorded sightings of the related giant squid have been made in recent years.

References

The following references are cited in the List of colossal squid table.

• [Anonymous] (2005). Very Rare Giant Squid Caught Alive. South Georgia Newsletter, June 2005. [Archived from the original on 16 February 2007.]
• [Anonymous] (2007a). NZ fishermen land colossal squid. BBC News, February 22, 2007.
• [Anonymous] (2007b). Microwave plan for colossal squid. BBC News, March 22, 2007.
• Aldridge, A.E. (2009). Can beak shape help to research the life history of squid? New Zealand Journal of Marine and Freshwater Research 43(5): 1061–1067. doi:10.1080/00288330.2009.9626529
• Anderton, H.J. (2007). Amazing specimen of world's largest squid in NZ. New Zealand Government website.
• Atkinson, K. (2008a). NZ Antarctic voyagers return with scientific treasure trove. The New Zealand Herald, March 20, 2008.
• Atkinson, K. (2008b). Size matters on 'squid row' (+photos, video). The New Zealand Herald, May 1, 2008.
• Black, R. (2008). Colossal squid's big eye revealed. BBC News, April 30, 2008.
• Burton, A. (2013). Radiance of the kraken. Frontiers in Ecology and the Environment 11(2): 112. doi:10.1890/1540-9295-11.2.112
• Cherel, Y. & G. Duhamel (2004). "Antarctic jaws: cephalopod prey of sharks in Kerguelen waters" (PDF). Archived from the original (PDF) on 2007-07-10. {{cite web}}: Unknown parameter |dead-url= ignored (|url-status= suggested) (help) (531 KiB) Deep-Sea Research I 51: 17–31.
• Cherel, Y. & K.A. Hobson (2005). Stable isotopes, beaks and predators: a new tool to study the trophic ecology of cephalopods, including giant and colossal squids. Proceedings of the Royal Society B: Biological Sciences 272(1572): 1601–1607. doi:10.1098/rspb.2005.3115
• Clarke, M.R. (1986). A Handbook for the Identification of Cephalopod Beaks. Clarendon Press, Oxford, 273 pages, ISBN 019857603X.
• Clarke, M.R. & N. Goodall (1994). Cephalopods in the diets of three odontocete cetacean species stranded at Tierra del Fuego, Globicephala melaena (Traill, 1809), Hyperoodon planifrons Flower, 1882 and Cephalorhynchus commersonii (Lacepede, 1804). Antarctic Science 6(2): 149–154. doi:10.1017/S0954102094000234
• Collins, P. (2012). Giant of the sea a rare find off Portland. The Warrnambool Standard, April 2, 2012.
• Ellis, R. (1998). The Search for the Giant Squid. The Lyons Press, 322 pages, ISBN 0140286764.
• Farquhar, P. (2014). Scientists Found Only The Second Intact Colossal Squid — Here's What It Looks Like. Business Insider Australia, 16 September 2014.
• Filippova, J.A. (2002). Review of Soviet/Russian studies on squids in the Antarctic Ocean. Bulletin of Marine Science 71(1): 255–267.
• Filippova, J.A. & E.A. Pakhomov (1994). Young squid in the plankton of Prydz Bay, Antarctica. Antarctic Science 6(2): 171–173. doi:10.1017/S095410209400026X
• Griggs, K. (2007). Colossal squid's headache for science. BBC News, March 15, 2007.
• Hoff, B. (2003). The greatest squid ever known to man. [pp. 83–97] In: Eggers, D. (ed.) McSweeney's 11. McSweeney's, San Francisco. 293 pp. + DVD. ISBN 978-1-932416-01-5.
• Klumov, S.K. & V.L. Yukhov (1975). Mesonychoteuthis hamiltoni Robson, 1925 (Cephalopoda, Oegopsida) i ego znatchenie v pitanii kashalota antarckticheskih vod. [Mesonychoteuthis hamiltoni Robson, 1925 (Cephalopoda, Oegopsida) and its significance to feeding of sperm whales in Antarctic waters.] Antarktika: Doklady Komissi 14: 159–189. [English translation: TT 81-59176, Al Ahram Center for Scientific Translations.] Template:Ru icon
• Korabelnikov, L.V. (1959). The diet of sperm whales in the Antarctic seas. Priroda 3:103-104, 5 figures. Template:Ru icon
• Kubodera, T. (1995). 大型イカ--マッコウクジラの胃内容から. [Giant squid from sperm whale stomach contents.] Aquabiology 17(6): 482–487. NAID 40004392241 Template:Jp icon
• Leviton, A.E. & F.H. Gibbs Jr. (1988). Standards in herpetology and ichthyology. Standard symbolic codes for institutional resource collections in herpetology and ichthyology. Supplement No. 1: Additions and corrections. Copeia 1988(1): 28–228.
• Leviton, A.E., F.H. Gibbs Jr., E. Heal & C.D. Dawson (1985). Standards in herpetology and ichthyology: Part I. Standard symbolic codes for institutional resource collections in herpetology and ichthyology. Copeia 1985(3): 802–832.
• Lu, C.C. & R. Williams (1994). Contribution to the biology of squid in the Prydz Bay region, Antarctica. Antarctic Science 6(2): 223–229. doi:10.1017/S0954102094000349
• McClain, C.R., M.A. Balk, M.C. Benfield, T.A. Branch, C. Chen, J. Cosgrove, A.D.M. Dove, L.C. Gaskins, R.R. Helm, F.G. Hochberg, F.B. Lee, A. Marshall, S.E. McMurray, C. Schanche, S.N. Stone & A.D. Thaler (2015). Sizing ocean giants: patterns of intraspecific size variation in marine megafauna. PeerJ 3: e715. doi:10.7717/peerj.715
• McSweeny, E.S. (1970). Description of the juvenile form of the Antarctic squid Mesonychoteuthis hamiltoni Robson. Malacologia 10:323-332.
• Robson, G.C. (1925). On Mesonychoteuthis, a new genus of oegopsid, Cephalopoda. Annals and Magazine of Natural History, Series 9, 16:272-277.
• Rodhouse, P.G. & M.R. Clarke (1985). Growth and distribution of young Mesonychoteuthis hamiltoni Robson (Mollusca: Cephalopoda): an Antarctic squid. Vie Milieu 35(3/4):223–230.
• Roper, C.F.E. & G.L. Voss (1983). Guidelines for taxonomic descriptions of cephalopod species. Memoirs of the National Museum of Victoria 44:49-63.
• Yukhov, V.L. (1974). The discovery of giant squids. Priroda, Moscow, 1974(6):60-63, 3 figures. Template:Ru icon
• Voss, N.A. (1980). A generic revision of the Cranchiidae (Cephalopoda; Oegopsida). Bull. Mar. Sci. 30:365-412.
• Xavier, J.C., P.G. Rodhouse, P.N. Trathan & A.G. Wood (1999). "A Geographical Information System (GIS) Atlas of cephalopod distribution in the Southern Ocean". Antarctic Science 11:61-62. online version
• Xavier, J.C. & Y. Cherel (2009). "Cephalopod Beak Guide for the Southern Ocean" (PDF). British Antarctic Survey, Cambridge. 129 pp.
• Xavier, J.C., J. Roberts & D. Agnew (2012). "P133 - Feeding ecology of toothfish species as a means for characterising the slope megafauna of the South Sandwich Islands, Southern Ocean" (PDF). Archived from the original (PDF) on 2013-09-21. Retrieved 2012-12-17. {{cite web}}: Unknown parameter |dead-url= ignored (|url-status= suggested) (help) In: Cephalopod International Advisory Council Symposium, 27 Oct - 02 Nov 2012, Majestic Palace Hotel, Florianópolis, SC, Brazil: Abstracts. Instituto Argonauta. p. 233.