DNA Analysis Identifies Killers of Great White Shark Found Dead in Australia

A DNA analysis conducted over a year after a 15-foot great white shark was found dead in southeastern Australia has identified orcas and broadnose sevengill sharks as its killers. The shark was discovered with extensive bite wounds and stripped of its internal organs, leading to public speculation about its demise. Researchers collected genetic material from the carcass, confirming that the orca DNA was linked to a significant bite wound consistent with liver extraction, while the smaller wounds contained broadnose sevengill shark DNA, indicating scavenging. This study is significant as it provides verified evidence of killer whale predation on white sharks in Australia, suggesting similar predation events are more common than previously thought. The findings align with past reports of orca attacks on sharks in other regions, notably South Africa. Overall, this research enhances understanding of the predator-prey dynamics involving apex marine predators.