Authorities in Sydney have issued urgent safety warnings and temporarily closed several beaches in the city’s northern suburbs following two separate shark sightings over the weekend. The alerts come just weeks after a fatal shark attack at Dee Why Beach, reigniting public concern over coastal safety and shark deterrent measures.
Twin Sightings Spark Immediate Action
On Saturday, October 5, 2025, lifeguards and Marine Rescue Sydney responded to reports of two sharks spotted off the coast between Manly and North Narrabeen. One sighting involved a vessel approximately 200 meters off North Narrabeen reporting a shark estimated to be over six meters long. Around the same time, a tagged tiger shark was detected by the North Steyne receiver near Manly Beach at 12:39 PM, according to the Department of Primary Industries.
As a precaution, beaches including Manly, North Steyne, Long Reef, and North Narrabeen were closed to the public. Jetskis were deployed to patrol the waters, and swimmers were urged to avoid unpatrolled areas.
Beaches were reopened later that afternoon after no further sightings were confirmed, but officials emphasized that caution remains essential.
“We have erred on the side of caution to keep beaches closed and our teams will remain vigilant in the days and weeks ahead,” said Northern Beaches Mayor Sue Heins.
Recent Fatal Attack Heightens Tensions
The sightings follow the tragic death of 57-year-old surfer Mercury Psillakis, who was fatally mauled by a great white shark at Long Reef Beach on September 6. Psillakis, a seasoned surfer, reportedly warned others in the water before being attacked. Despite efforts by fellow surfers and lifeguards, he succumbed to his injuries.
The incident marked Sydney’s first fatal shark attack since 2022 and has reignited debate over the effectiveness of shark nets and other deterrent technologies
Shark Nets Under Scrutiny
While shark nets were installed along the Northern Beaches in early September, experts argue they offer limited protection. Marine biologist Dr. Christopher Pepin-Neff noted that nets are more effective against bull sharks than great whites, which are pelagic and often bypass netted areas.
“There’s no evidence to support that shark nets reduce the risk of a bite from a white shark,” Pepin-Neff told ABC News. “They’re open at the bottom and sides, and large swells can wash them away.”
Environmental groups have also raised concerns about the impact of nets on marine life, with reports of dolphins, turtles, and other species becoming entangled.
Safety Measures and Public Guidance
In response to the recent incidents, the New South Wales government has deployed additional smart drumlines—buoys with baited hooks that alert authorities when a shark is caught and allow for tagging and relocation. Surveillance has also been increased along high-risk beaches.
Beachgoers are advised to:
- Swim only at patrolled beaches during daylight hours
- Avoid swimming near schools of fish or seals
- Refrain from wearing shiny jewelry or brightly colored swimwear
- Check local beach alerts before entering the water
Authorities continue to monitor shark activity using acoustic receivers and aerial patrols.
