Somewhere in the dark, steep-walled submarine canyons off Western Australia’s northwest coast, a giant squid has been leaving traces of itself in the water. Scientists just found them.
A research team led by Curtin University’s Georgia Nester has detected environmental DNA (eDNA) from Architeuthis dux, the giant squid, in filtered seawater collected from two deep canyon systems inside Gascoyne Marine Park. The genetic fragments turned up in six separate samples spanning the Cape Range and Cloates canyons, marking what the researchers describe as a probable new geographic record for the species in the eastern Indian Ocean.
The findings, published in the journal Environmental DNA and announced in May 2026, emerged from a broader biodiversity survey conducted aboard the Schmidt Ocean Institute’s research vessel Falkor during expedition FK200308. That same mission deployed ROV SuBastian, a remotely operated submarine, to film the canyon habitats in detail, capturing hours of footage from the rugged walls and floors where the squid DNA was found.
A creature that almost no one has seen alive
Giant squid can stretch beyond 12 meters in length, with eyes the size of dinner plates adapted for the near-total darkness of the deep ocean. Despite their size, confirmed live encounters are vanishingly rare. Japanese researcher Tsunemi Kubodera captured the first still images of a living giant squid in 2004, roughly 900 meters deep near the Ogasawara Islands. In 2012, a joint NHK and Discovery Channel expedition filmed one alive on video for the first time, also in Japanese waters. The only other confirmed live footage came in 2019, when a NOAA team using a specialized low-light camera called the Medusa recorded a giant squid in the Gulf of Mexico at around 760 meters depth.
No one has ever filmed a living giant squid in Australian waters. The ROV SuBastian footage from the Falkor expedition documented a rich array of deep-sea life across the canyon systems, but based on available expedition records, it did not capture a confirmed visual encounter with Architeuthis. What the eDNA results do is pinpoint, for the first time, a specific region off Australia where the animal appears to be present, giving future expeditions a target.
How filtered seawater revealed a giant
The detection method, called eDNA metabarcoding, works by filtering trace genetic material from bulk water samples and matching the recovered DNA sequences against reference databases. Every marine organism sheds cells, mucus, and waste into the surrounding water. By collecting and analyzing that biological residue, researchers can inventory species without ever seeing or catching them.
For the Gascoyne survey, the team collected 178 ten-liter water samples across five depth layers in the two canyons. Lab analysis identified more than 200 species across 126 families, making it one of the most detailed biological inventories of the region to date. Six of those samples carried the genetic signature of giant squid.
“This is a putative new record or range extension for the species,” Nester noted, meaning Architeuthis dux had not previously been confirmed in these waters through any method. The study was co-authored by WA Museum curator Lisa Kirkendale and senior author Zoe Richards.
What the DNA can and cannot tell us
An eDNA detection is not the same as a sighting. The genetic fragments could have come from a living squid shedding cells as it moved through the canyon, from a decomposing carcass drifting in the current, or even from the fecal material of a sperm whale that consumed a giant squid somewhere else entirely. Deep canyon systems funnel organic material across long distances, and eDNA can persist in cold, low-light water for days or longer depending on conditions.
The published study does not specify the exact depths or coordinates where the six positive samples were collected, nor does it indicate which of the five depth strata yielded the Architeuthis DNA. That missing detail limits the ability of follow-up missions to target a precise water column layer for a visual encounter.
Still, the signal is hard to dismiss. Six positive detections across two separate canyon systems suggest more than a single stray fragment carried in by currents. The Cape Range and Cloates canyons cut deep into the continental margin and are shaped by complex oceanographic regimes, making them plausible habitat corridors or feeding grounds for large deep-sea predators.
Where the search goes from here
Bridging the gap between genetic traces and a live sighting will likely require a combination of approaches. Baited camera systems tuned for low light, similar to the Medusa rig that captured the 2019 Gulf of Mexico footage, could be deployed at depths where eDNA concentrations appear strongest. Autonomous underwater vehicles programmed to hover in the canyons for extended periods might catch an encounter that a crewed expedition would miss. Acoustic surveys could also help, since large soft-bodied animals sometimes produce detectable signatures in the water column.
Repeated eDNA sampling over multiple seasons would reveal whether the Architeuthis signal is persistent or episodic, hinting at migration patterns, seasonal feeding, or even spawning activity in the canyons.
For conservation planners managing Gascoyne Marine Park, even an indirect detection carries weight. Marine parks are typically zoned based on known biodiversity, and adding a globally iconic deep-sea species to the list of probable inhabitants strengthens the case for sustained protection of canyon habitats and careful scrutiny of any future industrial activity nearby.
A few liters of water, centuries of mystery
Giant squid have fueled seafaring legends for centuries, from Norse tales of the kraken to Victorian-era accounts of tentacled monsters dragging sailors beneath the waves. Science has slowly replaced myth with data, but the data remains extraordinarily thin. Fewer than a handful of live encounters have ever been recorded on camera, and much of what researchers know about the animal still comes from dead specimens washed ashore or pulled from the stomachs of sperm whales.
The Western Australian eDNA survey does not deliver the dramatic footage the world has been waiting for. But it does something that may prove just as valuable: it narrows the search. A few liters of seawater hauled up from a dark canyon floor now carry the genetic fingerprints of a creature that has eluded nearly every attempt to observe it. The next step is to go back with cameras rolling and the lights turned low.
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*This article was researched with the help of AI, with human editors creating the final content.
