New Video of Giant Squid Surfaces

Screen Shot 2015-12-29 at 9.24.07 AMVideo of a very large squid swimming near a dock made the rounds last week across many social media streams.  The squid is actually an Architeuthis, aka the Giant Squid.  The was confirmed by Dr. Mike Vecchione from the Smithsonian, one of the world’s leading experts on cephalopods, on Dr. Chris Mah’s, also of the Smithsonian, Facebook post of the video.  I’m just lucky to also be Dr. Mah’s Facebook friend.  There are many reasons to think this is specifically Architeuthis dux, foremost being that a recent study found little genetic evidence to justify more than one species.

Screen Shot 2015-12-29 at 9.01.04 AM Screen Shot 2015-12-29 at 9.01.29 AMThe individual was found in Japan’s Toyama Bay.  Interestingly, this is the sixteenth Giant Squid sighting in the last year in Toyoma Bay.  In some regards, this is not surprising.  Toyoma Bay serves as the head of a deep canyon axis. The Giant Squid is cosmopolitan in the world’s ocean but as Guerra et al. show the squid appears mostly in areas with submarine canyons that cut across the continental shelf. These canyons provide areas of high productivity including fishing grounds humans and squids alike often exploit.

Why the recent increase in sightings in Toyama Bay?  Seeing a Giant Squid in shallow water undoubtedly indicates the individual is sick or injured.  The Giant Squid’s blood is poor at oxygen transfer making them particularly vulnerable to lowered oxygen, warming, and acidification.  Heat speeds an animal’s metabolism.  Because of their energy requirements and oxygen needs, Giant squid must stick to cooler waters.  Indeed, it is hypothesized their global distribution in the oceans is limited by warm temperature barriersGuerra et al. also demonstrate that strandings of Giant Squid in Newfoundland were always associated with rises in ocean bottom temperature.

Fig. 2. from Guerra et al. Annual number of giant squid recorded in Newfoundland waters since 1946 versus autumn (September–December) near-bottom temperature.

Fig. 2. from Guerra et al. Annual number of giant squid recorded in Newfoundland waters since 1946 versus autumn (September–December) near-bottom temperature.


Nonetheless, the video of the squid, only the third, is the best quality and detail yet of a living Giant Squid.  The individual is probably still young, measuring 3.7 metres (about 12 feet) long, is small.  Most of known individuals of Giant Squids measure well above this.  Indeed, 50% of measured Giant Squids are above 7.5 meters in length, nearly double of the Toyoma Bay individual.


Dr. M (1749 Posts)

Craig McClain is the Executive Director of the Lousiana University Marine Consortium. He has conducted deep-sea research for 20 years and published over 50 papers in the area. He has participated in and led dozens of oceanographic expeditions taken him to the Antarctic and the most remote regions of the Pacific and Atlantic. Craig’s research focuses on how energy drives the biology of marine invertebrates from individuals to ecosystems, specifically, seeking to uncover how organisms are adapted to different levels of carbon availability, i.e. food, and how this determines the kinds and number of species in different parts of the oceans. Craig’s research has been featured on National Public Radio, Discovery Channel, Fox News, National Geographic and ABC News. In addition to his scientific research, Craig also advocates the need for scientists to connect with the public and is the founder and chief editor of the acclaimed Deep-Sea News (, a popular ocean-themed blog that has won numerous awards. His writing has been featured in Cosmos, Science Illustrated, American Scientist, Wired, Mental Floss, and the Open Lab: The Best Science Writing on the Web.

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