Two large sharks have been spotted off separate Mandurah beaches.
The Surf Life Saving helicopter sighted the first shark about 250m offshore at Rocks Surf Break near Falcon around 9.45am on Wednesday.
It was believed to be a 3.5 metre tiger shark.
The helicopter then spotted the second shark, a three-metre bronze whaler, about 300m off Wedge Surf Break near Pyramids Beach in Dawesville about 9.50am.
Beachgoers are being advised to be extra cautious when in the water.

The sharks were spotted within minutes of each other. PIC: SharkSmart
SLS Westpac Heli report 3.0m bronze whaler shark sighted at 9:50hrs 10/04, MH216 Mandurah Wedge Surf Break BEN Sign, south of Mandurah. 300m offshore. Circling.
— Surf Life Saving WA (@SLSWA) April 10, 2024
SLS Westpac Heli report 3.5m tiger shark sighted at 09:45hrs 10/04, MH167 Rocks Surf Break BEN Sign, south of Mandurah. 250m offshore. Tracking South.
— Surf Life Saving WA (@SLSWA) April 10, 2024
Teen accused of ordering firebomb attack on Baldivis tobacco shop
City of Mandurah sees sharp rise in animal cruelty reports
Geoff Valentine returns to Peel Thunder as senior coach
Golden Bay woman charged with lacing colleague's curry lunch with snail poison
Cooloongup man charged over alleged sexualised online conversations with a child
Bushfire readiness takes centre stage at City of Kwinana's free Summer Sounds festival
WA Open Golf Championship to tee off at Secret Harbour Golf Links
Halls Head named WA's most persistent storm damage hotspot
Four illegal e-bikes to be crushed after police crackdown in Halls Head, Falcon