Beach goers have been urged to take caution after a shark was spotted 15 metres offshore along Halls Head Beach.
The shark is believed to be about three metres long and an unknown species.
A public shark sighting report on the creature was received about 11.45am on June 13.
To view current alerts and warnings visit www.sharksmart.com.au and check out their shark activity map.
If you spot a shark report it to the water police on 9442 8600.
Public report 3.0m unknown sp. shark sighted 11:45hrs 13/06, Halls Head Beach, Mandurah 15m offshore , nr Sea Scapes .— Surf Life Saving WA (@SLSWA) June 13, 2018
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