Authorities have reopened two South West beaches which were closed after shark sightings yesterday.
WA Surf Life Saving Association spokesman Chris Peck said restrictions had been removed at Pyramid Beach in Dawesville after unconfirmed sightings of a 2m shark forced its closure yesterday afternoon.
Mr Peck said the association's helicopter patrolled the area following reports of the shark, but had been unable to confirm the sighting.
Earlier yesterday, the Shire of Augusta-Margaret River closed a stretch of beach between Gnarabup and Surfer's Point after a surfer spotted a four-metre shark lurking nearby shortly before 8am.
A spokeswoman for the shire said the closure had been lifted last night.
It comes as the WASLSA reports a sharp increase in the number of calls it has received about suspected shark sightings.
Mr Peck said there had been anxiousness among beach goers and water users about the perceived threat of shark attacks in recent weeks.
This follows several attacks on people in waters off the state's South West this year including the fatal mauling of Busselton father-of-two Nick Edwards at Gracetown in August.
"This last couple of weeks, people have been a bit edgy for some reason or a bit jumpy - they've been a bit quick to call a sighting when they see something moving through the water," Mr Peck said.
"It happened at Trigg and Scarborough yesterday with a sun fish, scuba divers were called in as a shark and it's happened with dolphins.
"So for whatever reason, I don't know, people are a bit edgy about what they're seeing out there.
"We're getting a lot of sightings coming through but we're not really getting any confirmed sightings."