Full Breakdown
Whale Carcass at City Beach Triggers Shark Activity and Prolonged Beach Closures
By Drooid · · How we work
Core Event: Removal of a Decomposing Whale and Ongoing Shark Presence
A 13-metre whale carcass washed ashore on City Beach early Monday. The animal, believed to be a 20-year-old female, was estimated at roughly 31 tonnes when first discovered. Sharks appeared within metres of the shoreline, with a 5-metre great white recorded 10 m offshore on Tuesday morning and a 4-metre individual spotted 30 m offshore later that day. The Town of Cambridge hired a 72-tonne crane to lift the carcass and transport it to a landfill.
Background & Context
Decomposing marine mammals release fluids and scent that can attract predatory sharks for days after a stranding. Local residents recalled a recent fatal shark bite at nearby Sorrento Beach, heightening anxiety. Tagged sharks off Floreat and City Beach this week reflect a broader pattern of increased shark activity along the Perth coastline following large organic attractants.
Official Statements & Responses
Mayor Gary Mack emphasized logistical and safety challenges, noting the cost of workers, contractors and disposal fees. He added that the operation interfered with helicopter rescue services. Macquarie University Fish Lab head Culum Brown warned that the carcass’s juices could leach into the sand for several tide cycles, prolonging the attractant effect.
Data & Statistics
- Whale length: 13 m; weight estimate: 31 tonnes (later reported around 18 tonnes after fluid loss).
- Shark sightings: 5 m white shark (10 m offshore), 4 m white shark (30 m offshore), plus 3.7 m and 3.1 m tagged sharks off Floreat and City Beach.
- Removal cost: projected $60,000–$100,000; Mayor Mack later estimated $100,000.
- Potential infringement fine for breaching closures: $250 per notice.
- Scheduled shark-barrier installation at nearby Cottesloe Beach: October 7 (pending weather, swell and seaweed).
On-the-Ground Reports
A resident said she might choose an alternative beach such as Cottesloe and would feel safer if lifeguards, drones or helicopters monitored the water.
Conflicting Reports & Gaps
Sources differ on the carcass’s weight after removal—one cites about 18 tonnes, another maintains the original 31-tonne figure. The crane is described as a 72-tonne machine, yet the operation’s difficulty was attributed to the carcass’s size and the inadequacy of an excavator initially used. No definitive timeline has been provided for when the beaches will reopen, and the exact number of infringement notices issued remains unknown.
Why It Matters
The incident highlights the financial and operational strain on councils when organic marine debris attracts sharks, prompting costly removal efforts and extended beach closures. Public safety concerns affect tourism and community recreation, while the planned barrier at Cottesloe underscores coastal-management challenges.
What’s Next
Authorities will continue monitoring shark activity and water conditions before lifting closures. The town plans to bury the whale in a landfill, and the shark-barrier installation at Cottesloe on October 7 will proceed pending suitable conditions. No specific reopening date for City Beach or Floreat Beach has been set.
