A popular beach in Perth’s northern suburbs could be closed for several days because of an algae bloom outbreak.
Mullaloo Beach was shut on Wednesday and swimmers have been urged to steer clear of the surf because of trichodesmium.
The algae, commonly referred to as sea sawdust, can be identified by a yellow-brown surface scum.
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It is not considered harmful to humans but authorities recommend people and pets do not swim or walk through it because it can cause a minor skin irritation.
If swimmers do come into contact, the advice is to rinse it off under water.
Mullaloo Beach has been closed by “sea sawdust”. Credit: 7NEWS
Authorities believe the bloom formed off the back of hot and calm conditions experienced in Perth in recent days, with the temperature twice surpassing 40C.
Mullaloo Surf Life Saving Club warned members the beach would be “temporarily closed” and all SLSC activities had been cancelled on Wednesday.
“(The) beach is temporarily closed as there is potentially an algae bloom,” the club said.
“At this stage it is unconfirmed and awaiting further testing and advice for the next couple of days.
“For everyone’s safety, it is recommended to keep out of the water.”