A duo of killer whales, acting in coordinated efforts, have been targeting and killing great white sharks along a segment of the South African coast since at least 2017. They primarily seek out the nutrient-rich livers of these sharks, leaving the rest of the carcass behind.
Scientists have been studying this unusual hunting behavior, which has caused shifts in the distribution of white sharks along the Cape Town coastline. Recently, research has unveiled a remarkable development in this behavior, shedding light on its potential implications for the broader marine ecosystem.
In a startling event witnessed by researchers, a male orca named Starboard swiftly hunted down and killed a juvenile white shark measuring 2.5 meters in just two minutes. Dr. Primo Micarelli, a marine biologist, expressed concern over the impact of these predators on coastal marine ecology.
While orcas are known for cooperative hunting, this instance of solitary hunting by Starboard contradicts typical behavior observed in the region. Alison Towner, the lead author of the study, highlighted the significance of this event, noting its departure from conventional orca hunting strategies.
The observed incident occurred near Seal Island, Mossel Bay, in June 2023, where researchers aboard two vessels witnessed Starboard’s swift and precise attack on the shark, leaving it eviscerated in minutes. The orca was later seen with a bloody piece of liver in its mouth, while its companion, Port, remained at a distance.
The duo, recognizable by their distinct dorsal fin shapes, has been known to hunt great white sharks since at least 2015, with documented instances captured as early as 2022. Researchers speculate that their arrival may be linked to broader ecosystem changes, potentially influenced by human activities such as climate change and industrial fishing.
While the orcas’ predation behavior may be alarming, it presents an opportunity to further understand the dynamics of marine ecosystems and the adaptability of apex predators like killer whales. However, unanswered questions remain about the long-term implications of their hunting behavior and its impact on marine biodiversity.
Shambhu Kumar is a science communicator, making complex scientific topics accessible to all. His articles explore breakthroughs in various scientific disciplines, from space exploration to cutting-edge research.
