A shark has been spotted off a Halls Head beach.
The three metre shark was sighted by a member of the public about 150 metres off Blue Bay Beach at 10.20am today.
Beachgoers are advised to take extra caution when entering the water.
Public report 3.0m unknown sp. shark sighted 10:20hrs 24/07, Blue Bay Beach, Mandurah 150m offshore
— Surf Life Saving WA (@SLSWA) July 24, 2018

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