SURF Life Saving closed popular surf break near Mindarie Beach on Monday morning due to a shark sighting.
The shark was spotted by the Life Saver Helicopter at Claytons surf break about 10.07am.
The species of the three metre shark is unknown.
It was spotted 50m offshore and heading south.
Lifeguards closed the beach about 10.30am.
— Surf Life Saving WA (@SLSWA) December 11, 2017