A rare and unexpected discovery has left marine biologists and researchers in awe: a sleeper shark has been caught on camera in the near-freezing depths of Antarctica. This remarkable sighting, captured in January 2025, challenges previous beliefs that sharks do not inhabit the frigid waters of this region. The shark, estimated to be between 3 and 4 meters long, was filmed by a camera operated by the Minderoo-UWA Deep-Sea Research Centre, positioned near the South Shetland Islands off the Antarctic Peninsula.
The discovery is significant as it suggests that sleeper sharks may be more widespread in the Antarctic Ocean than previously thought. These sharks, known for their slow movement, could have been present in the region for a long time without being detected. The camera, positioned at a depth of 490 meters, where the water temperature was a near-freezing 1.27 degrees Celsius, captured the shark's cautious and brief appearance. This depth is well within the boundaries of the Antarctic Ocean, also known as the Southern Ocean, which extends below the 60-degree south latitude line.
The research center's camera, which operates during the Southern Hemisphere summer months, has revealed a skate, a shark relative resembling a stingray, in the same frame. While the skate's presence is not surprising, as scientists already knew their range extended to these latitudes, the shark's appearance is a remarkable find. Researchers, including Alan Jamieson, the founding director of the University of Western Australia-based research center, have found no records of another shark in the Antarctic Ocean.
Peter Kyne, an independent conservation biologist, agrees that this is the first recorded sighting of a shark so far south. Climate change and warming oceans may be driving sharks to the Southern Hemisphere's colder waters, but the region's remoteness limits data on range changes. The slow-moving sleeper sharks could have been in Antarctica for a long time without being noticed.
Jamieson highlights the importance of this discovery, stating that the shark population in the Antarctic Ocean is likely sparse and difficult for humans to detect. The shark was maintaining a depth of around 500 meters, where the seabed slopes into much deeper water. This depth is significant because it corresponds to the warmest layer of water, which is a critical factor for the shark's survival in the cold Antarctic environment.
The Antarctic Ocean's unique layering, or stratification, up to a depth of around 1,000 meters, is due to the interaction of colder, denser water from below and fresh water from melting ice above. Jamieson expects that other Antarctic sharks live at similar depths, feeding on the carcasses of marine creatures that sink to the bottom. The limited number of research cameras at this specific depth in Antarctic waters further emphasizes the rarity of this discovery.
This unexpected sighting serves as a reminder of the ocean's mysteries and the ongoing need for research to understand the behavior and distribution of marine life, especially in the face of climate change.
