Giant Squid Presence Confirmed Off Western Australia Coast Through Environmental DNA Analysis

BREAKING NEWS: Giant Squid DNA Found in Western Australian Waters

Perth, Australia – Scientists have confirmed the presence of giant squid (Architeuthis dux) off the coast of Western Australia using environmental DNA (eDNA) analysis of seawater samples. This marks the first genetic confirmation of the elusive deep-sea creature in the region, according to a study published this week.

“The detection of giant squid DNA in multiple samples is definitive proof that these animals are living in these waters,” said Dr. Helen Marlow, lead author of the study at the University of Western Australia’s Ocean Institute. “This method allows us to monitor species without ever laying eyes on them.”

Background

Giant squid have long been legendary creatures of the deep, rarely seen alive in their natural habitat. Most knowledge comes from carcasses washed ashore or caught incidentally by fishermen. Western Australia’s vast, deep canyon systems near the continental shelf have been suspected as habitat, but direct evidence had been lacking.

From 2019 to 2022, researchers collected seawater at 16 sites in the Perth Canyon and nearby waters, filtering thousands of liters to capture tiny traces of DNA shed by marine life. Using a genetic marker specific to giant squid, they detected the species in three samples, with the strongest signals near a 2,000-meter-deep trench.

“eDNA is revolutionizing how we study the ocean’s most reclusive giants,” commented Dr. James Lockhart, a marine ecologist at CSIRO who was not involved in the study. “It’s like finding a needle in a haystack—but the haystack is the sea.”

What This Means

The finding challenges assumptions about giant squid range. Previously thought to favor colder waters of the North Pacific and Atlantic, this discovery suggests a more widespread distribution. It also underscores the value of eDNA as a non-invasive tool for discovering cryptic species in remote ocean areas.

“This opens the door for systematic biodiversity surveys of deep-sea canyons without expensive ROV dives,” said Dr. Marlow. “We can now ask: ‘Where else are they hiding?’”

Conservation implications are significant. Giant squid are a key prey item for sperm whales and a top predator in their own right. Understanding their habitat helps prioritize marine protected areas offshore mines and shipping lanes. “Every DNA trace is a piece of a much larger puzzle,” added Dr. Lockhart. “We’re finally mapping the dark ocean.”

Researchers plan to expand sampling across the Indian Ocean, deploying underway sampling on research vessels. The team also urges fishers to report any unusual squid sightings, which can be cross-checked with eDNA data.

For further reading: See our background section on eDNA methods, and what this means for future deep-sea exploration.

Key Facts at a Glance

• Species confirmed: Giant squid (Architeuthis dux)
• Method: Environmental DNA analysis of seawater
• Location: Perth Canyon and nearby waters, Western Australia
• Significance: First genetic proof in the region; expands known range

Expert Reactions

“This is a game-changer for marine cryptozoology,” said Dr. Sarah Chen, a deep‑sea biologist at the Monterey Bay Aquarium Research Institute. “eDNA gives us a voice for the invisible majority of ocean life.”

The study appears in the journal Marine Biology Letters. Researchers acknowledge support from the Australian government’s ‘Ocean Genomics’ initiative.