A 2.5 metre shark has been spotted close to shore off Secret Harbour.
The bronze whaler was sighted by the Surf Life Saving helicopter around 10.12am on Wednesday about 30 metres offshore.
It is tracking north.
Although bronze whalers are not known to be aggressive, beachgoers are advised to be extra cautious when in the water.
Secret Harbour beach is now closed due to the shark sighting.
SLS Westpac Heli report 2.0m unknown sp. shark sighted 10:18hrs 29/09, RO318 Secret Harbour BEN Sign, north of Mandurah 20m offshore , Tracking North.
— Surf Life Saving WA (@SLSWA) September 29, 2021
Date set for Mandurah's Town Ward Extraordinary Election
Elderly North Pinjarra woman hands over $10k cash to scammers
'Gale' the whale heads back to sea after 19 days in Peel-Harvey Estuary
Secret Harbour by-election: Former Rockingham councillor Craig Buchanan endorsed as Legalise Cannabis WA Party candidate
Gang of youths remain on run after Warnbro servo break-in
Mandurah flooded as rainfall total tops state
Aerial firefighter loses Serpentine home in devastating blaze
Rumours Rockingham councillor Ryan Robertson to be announced as Liberal candidate for Secret Harbour by-election
Baldivis man fined for throwing ex-wife's elderly dog