The secret life of the Arctic: what's really happening under the ice

A snail fish, or Liparidae, passes near the upward-looking camera in Inglefield Bredning, Greenland. 

Far below Greenland's frozen surface, cameras have captured a rarely seen world where narwhals glide through darkness and strange deep-sea creatures drift beneath melting ice.

Researchers studying Inglefield Bredning Fjord lowered a video camera equipped with red lights and a hydrophone 260 meters (853 feet) to the seafloor.

Over the course of a week, they recorded rare sights including a backward-swimming fish and narwhal vocalizations, alongside other elusive deep-sea creatures.

 

From ArcticToday

Far below Greenland’s frozen surface, cameras have captured a rarely seen world where narwhals glide through darkness and strange deep-sea creatures drift beneath melting ice.

Researchers studying Inglefield Bredning Fjord lowered a video camera equipped with red lights and a hydrophone 260 meters (853 feet) to the seafloor.

Over the course of a week, they recorded rare sights including a backward-swimming fish and narwhal sounds, alongside other elusive deep-sea creatures, according to findings published in PLOS One.

The team’s primary goal was to study narwhals in the area, so they angled the camera upward to maximize observation without sediment clouding the lens — narwhals are known to approach filming equipment from above.
What they found exceeded their expectations.

“Arctic glacial fjords are hotspots of marine life, but they are understudied as a result of their remoteness and difficult access, particularly their seafloor ecosystems,” the authors wrote.

Although the camera caught only a single glimpse of a narwhal tusk during the filming period, researchers were rewarded with an entire hidden underwater world.
“Overall, the results show that portable moorings with video recorders are an important tool for exploration of the Arctic seafloor,” the study concludes.

Key Takeaways

 

• Elusive Arctic marine life on display: The footage documented a range of organisms living just above the seafloor, including shrimp, jellyfish, amphipods, copepods, snailfish, and narwhals.
• A strange backward-swimming fish drew particular attention: Researchers observed a snailfish drifting backward with its tail curled — a behavior rarely documented in the wild. “It curled its tail and remained motionless for at least 16 seconds before disappearing from view.”
• Narwhals were detected both visually and acoustically: Hydrophones recorded narwhal vocalizations nearly every day, and one narwhal tusk passed within centimeters of the camera lens.
• The system was designed to minimize wildlife disturbance: Rather than bright white lights, researchers used red LEDs, which are less visible to many deep-sea species, enabling more natural behavior to be observed.
• Dramatic shifts in “marine snow” were also recorded: Organic particles drifting through the water column doubled in concentration within hours and changed direction with tidal currents, underscoring how dynamic Arctic deep-water systems can be.
• The technology could expand Arctic monitoring globally: Because the system is relatively lightweight and portable, scientists say it could make long-term monitoring of remote polar ecosystems easier and more affordable.

Why It Matters

Much of the Arctic’s underwater world remains poorly understood — even as climate change rapidly reshapes the region.
Fjords like Inglefield Bredning are biological crossroads, where glaciers, ocean currents, marine mammals, and deep-sea ecosystems converge in ways scientists are only beginning to document.

This study offers a rare, direct window into that hidden environment.
Beyond its striking imagery, it demonstrates how new technology could allow scientists to track ecological shifts in real time as warming oceans, retreating glaciers, and shrinking sea ice reshape Arctic food webs.

What makes the research especially urgent is what it reveals about the limits of our current knowledge: the most consequential environmental changes in the Arctic are often happening out of sight — beneath the ice, below the surface, in the dark.
As the Arctic continues to warm faster than anywhere else on Earth, understanding these invisible systems may matter more than we yet realize.