An unusual sighting occurred when a large sleeper shark, resembling a barrel, was captured on video gliding lazily through the dark depths of the Antarctic seabed. This discovery challenged the belief among experts that sharks were absent in the icy waters of Antarctica. The footage, taken in January 2025 near the South Shetland Islands, revealed a massive shark measuring between three to four meters in length.
Researchers, led by Alan Jamieson from the Minderoo-UWA Deep-Sea Research Centre, were surprised by the presence of such a robust shark in the region, as it defied the common notion that sharks did not inhabit Antarctic waters. The video, filmed at a depth of 490 meters with a water temperature of just above freezing, also captured a skate resting undisturbed on the seabed near the passing shark.
The research team allowed The Associated Press to share the footage, showcasing the rare encounter with the deep-sea predator in the Southern Ocean. According to Jamieson, no previous records existed of sharks in this part of the Antarctic Ocean, making this sighting significant. Peter Kyne, an independent conservation biologist, supported this claim, emphasizing the lack of historical shark sightings in the area.
The researchers suggested that climate change might be pushing sharks towards the colder waters of the Southern Hemisphere, although conclusive data on this phenomenon was scarce due to the remote nature of the region. The slow-moving sleeper sharks, known for their elusive behavior, could have been present in Antarctica unnoticed for a long time.
The population of sleeper sharks in the Antarctic Ocean was believed to be sparse, making them challenging for human detection. The observed shark was seen maintaining a specific depth of around 500 meters, likely attracted to the warmest layer of water where it could scavenge on deceased marine creatures. The stratified nature of the Antarctic Ocean, with distinct water layers, was noted to create unique habitats for these deep-sea predators.
Given the limited research presence at such depths in Antarctic waters, these surprising discoveries were attributed to the seasonal monitoring restrictions during the Southern Hemisphere summer months. Jamieson highlighted the importance of continued exploration to unveil more mysteries hidden beneath the Antarctic waters.
