A school of around 20 hammerhead sharks has been spotted off Point Peron Beach in Rockingham.
The Surf Life Saving helicopter sighted the sharks around 9.20am on Monday about 200 metres offshore.
They are between one and two metres in length.
Beachgoers are advised to be extra cautious when in the water.
Nearly 100 new rentals to be built in Mandurah
Mandurah will soon be home to almost 100 new rentals as part of a State Government initiative to boost housing in the region.
Blue swimmer crabs off limits during season closure
Recreational fishers are reminded not to catch blue swimmer crabs during the annual spawning closure from September 1 to November 30.
Fire crews on scene of Meadow Springs house fire
Firefighters are on the scene of a house fire in Meadow Springs.
Perth's southern suburbs declared One Nation's 'heartland' after Secret Harbour by-election victory
One Nation's Luke Herdegen has declared Perth's south as the party's "heartland'" after a significant Secret Harbour by-election victory.
Construction contract awarded for Kwinana Freeway upgrade
Construction is set to begin early next year to upgrade more than 29kms of the Kwinana Freeway between Roe Highway and Safety Bay Road.
Port Kennedy humpback whale buried at landfill facility
A humpback whale carcass has been transported to a landfill facility after it became stranded and died on a Port Kennedy beach.
Secret Harbour by-election: Where to vote on August 29
Thousands of Secret Harbour electors will cast their vote in this Saturday’s by-election.
Mandurah man charged over role in alleged sophisticated cybercrime syndicate
A Mandurah man is one of two alleged criminal masterminds accused of being behind a highly sophisticated global cybercrime syndicate.
Locals urged to look out for man who removed electronic monitoring device
Detectives are looking for a man who removed his electronic monitoring device and could be in the Mandurah area.