A large patrol vessel from Perth and aerial surveillance will continue in Western Australia's south west while school leavers are in the area after a fatal shark attack.
Police will be in control of a school leavers party at Meelup beach on Wednesday night but the Department of Fisheries will work with them to monitor the water.
Fisheries Shark Response Unit spokesman Tony Cappelluti said while people needed to be cautious, there was no suggestion that the event should be cancelled.
Chris Boyd, 35, was surfing at the popular surf break Umbies off Gracetown when a shark, believed to be a great white, bounced off another surfer's board and attacked him on Saturday morning.
Beaches were closed and authorities searched unsuccessfully for the shark, which was deemed an imminent risk, but the search was called off on Monday night and the beaches were re-opened.
