A spate of shark bites in Sydney has left ocean lovers on edge, with experts pointing to warming ocean temperatures as a key factor. Bull sharks, in particular, are spending more time in the Sydney area, increasing the risk of encounters. The latest victim, 34-year-old Leah Stewart, suffered severe injuries from a suspected great white shark bite while swimming between the flags at a patrolled beach.
Data from the Australian Shark Incident file shows a sharp rise in unprovoked incidents, from an average of 3.1 per year in the 1950s to 21 per year this decade. Deaths have also increased, from 1.7 to 3.8 per year, though improved response times and tourniquet kits have likely saved lives. Australia now ranks second globally for shark bites, behind the United States.
Emeritus Professor Rob Harcourt of Macquarie University notes that rising sea temperatures are drawing bull sharks and tiger sharks closer to populated areas. Meanwhile, recovering populations of seals and whales—prey for large sharks—may be contributing to the trend. However, shark net data shows no significant increase in overall shark numbers, contradicting calls for culls.
Experts stress that the risk varies by location and species, with factors such as proximity to seal colonies or river mouths playing a role. Despite the anxiety, Harcourt advises swimmers to remain cautious but notes that the chance of being bitten remains extremely low.
