Sorrento Beach has been closed following the discovery of a rotting whale carcass, marking the third time in weeks a dead marine giant has sparked a shark alert along Perth’s coast.

The closure on Sunday morning came just weeks after swimmer Greg O’Neill was killed by a shark at the exact same beach, with fears in the community still heightened.

Surf Life Saving WA reported the latest carcass at 7.10am, prompting the City of Joondalup to close the beach to the public.

While authorities confirmed the remains had been removed by 10.40am, beaches in the Sorrento area remained shut to protect the community.

The Department of Primary Industries and Regional Development warned that the carcass could act as an attractant and draw sharks into the shallows.

Perth resident Andrew Ward captured part of the whale’s tail floating about 50m offshore in a video shot by his drone.

“Another day, another whale carcass washing up on Perth beaches,” he wrote in an Instagram post alongside the clip.

“Why so many dead whales this year? Is it linked to the very odd migration this season?

“No sharks currently however they have definitely had a decent feed from the one.”

The carcass was later reported washed up about one metre from shore.

Just days earlier, a juvenile whale washed ashore at South Cottesloe’s Dutch Inn Beach at 6.15am on Thursday with the discovery forcing the Town of Cottesloe to close surrounding beaches after sharks were sighted in the water.

Rangers and a contractor used an excavator to remove the remains by 12.15pm, trucking it to the Red Hill Waste Management Facility.

Last month, a massive 31-tonne humpback whale turned South City Beach into a great white feeding frenzy.

The 13-metre carcass lured several predators, including a five-metre monster, just 10 metres from the water’s edge, while two other white sharks were caught and tagged on drumlines off nearby Floreat Beach.

The multi-day removal operation stung ratepayers an estimated $180,000, with the remains also dumped at Red Hill.

This year has been one of the deadliest in recent memory for fatal sharks attack.

Before Mr O’Neill’s death last month, 35-year-old Daniel Turpin was killed by a 4.5-metre shark while spearfishing off Albany in June.

In May, 38-year-old father Steven Mattaboni was also killed when he was attack by a large great white while spearfishing off Rottnest.

To address community concerns following the surge in dead whales and shark sightings, the State Government committed an extra $5 million into shark mitigation strategies ahead of summer.

The funding boost includes $800,000 to increase DPIRD tagging efforts, $500,000 for monitoring network receivers, and increased helicopter patrol hours.

Surf Life Saving WA was also looking to develop AI drones to automatically detect sharks and make beach monitoring more efficient.