The savage mauling of a swimmer by a great white shark at Coogee Beach in Sydney has jolted Australia’s long-standing debate over coastal safety into urgent new territory. Leah Stewart, a 35-year-old teacher and mother, was attacked between the flags on Saturday, losing her left arm and fighting for her life in hospital. Witnesses described a ‘massive pool of blood’, and an off-duty paddleboard champion pulled her onto his board. The incident eerily echoed the summer of 1922, when two young men were killed off the same beach, prompting the nation’s first shark-proof fence and a bounty on sharks. Now, a century later, the New South Wales government is revisiting its mitigation playbook, with Premier Chris Minns suggesting a cull of bull sharks could be considered while ruling it out for great whites. Viewed from Sydney, the attack has galvanised calls for a technological leap: autonomous drones equipped with artificial intelligence that could patrol bays, detect sharks in real time, and sound an alert.

While the human toll dominated headlines, a simultaneous operation 280 kilometres south underscored the quieter entanglements of marine life. Near Batemans Bay, a humpback whale was spotted dragging 46 metres of fishing line, two buoys and 13 kilograms of seaweed. Teams from national parks, marine rescue and a volunteer cetacean group worked through Saturday to cut the animal free. After the disentanglement, the whale immediately swam faster and ‘responded positively’, officials said. The contrast between a frantic rescue on a metropolitan beach and a methodical liberation on a coastal bay illustrates the breadth of human–marine interaction now playing out along Australia’s shores.

A third front has opened in the nation’s relationship with the sea, this time among freshwater and estuary anglers. The rapid uptake of forward-facing sonar – technology that offers a live, video-like image of fish beneath a boat – has split the fishing community. Some enthusiasts argue it is merely another tool, no different from a depth sounder, while critics insist it erodes the elemental uncertainty that defines the pursuit and threatens fish stocks by making catches too efficient. Analysts in London observe that the same tension has surfaced in European coarse fishing circles after the introduction of high-resolution imaging, raising questions about whether sport or harvest should govern recreational fishing’s future. The NSW government’s openness to scaling up drone patrols mirrors this embrace of high-tech answers, but the sonar rift suggests the public appetite for such interventions is far from uniform.

Looking ahead, the convergence of these events points to a summer in which AI-powered warning systems could be operational above Sydney’s beaches, testing the balance between automation and human judgment. The whale rescue, successful as it was, also serves as a reminder that abandoned fishing gear remains a lethal threat to cetaceans, a problem likely to intensify as maritime industries grow. And the sonar debate will only sharpen as the devices become more affordable and their ecological footprint comes under scrutiny. For a nation whose identity is deeply tied to its coastline, the challenge is not simply to deploy technology but to decide what kind of relationship with the ocean it is meant to facilitate.