A 3.5m great white shark has been spotted off a Falcon beach, near where the Mandurah Pro surfing competition is taking place.
The shark was sighted by a member of the public about 500m off Avalon Beach around 8am on Monday.
Surfing Western Australian Events Manager Justin Majeks said despite the sighting, the Mandurah Pro is still going ahead.
"We were made aware by some fishermen early this morning that they spotted a shark at the back of our competition area," he said.
"We've got a good safety protocol in place.
"We've got a drone in the air and water safety officers on deck too and we haven't seen or detected anything else."
The Mandurah Pro is a four-day surfing event which finishes on Tuesday.
Public report 3.5m white shark sighted 08:00hrs 15/10, Avalon Beach, Mandurah 500m offshore , 200m north of Avalon beach..
— Surf Life Saving WA (@SLSWA) October 15, 2018
Tragic update in search for missing man Robert Snyder
Premier Roger Cook to leave Kwinana electorate, move to Perth
Mandurah Marine Rescue's new vessel named in memory of nun who survived 1959 boating accident
Teen dies in motorbike crash at Waroona Dam
Shark alert issued after whale carcass reported at Preston Beach
Kwinana businesses to refuse serving students during school hours
Men attacked, campervan windows smashed in East Rockingham
Entries for 2026 Castaways Sculpture Awards now open
Meadow Springs man pleads guilty to threatening to kill PM and NSW Premier