Another Perth beach closed as more whale remains found

Whale remains have closed another Perth beach today, as authorities warned of possible shark activity in Sorrento after removing the tail of a carcass found just off the shore.

This is the second whale carcass to wash up on the city's beaches this week, and the third in the past month, raising concerns about a further increase in shark activity just as beaches are about to become more crowded ahead of summer.

Sorrento Beach was closed about five weeks ago when Perth father Greg O'Neill was attacked and killed by a large great white shark as he was swimming close to the shoreline.

He was the third person killed by a shark in Western Australia this year.

The City of Joondalup removed the whale remains from Sorrento Beach a few hours after surf lifesavers reported seeing them, but said the beaches in the area remained closed as "residue from where the whale carcass was beached may attract sharks to the area".

The Department of Primary Industries and Regional Development (DPIRD), along with staff from other agencies, is monitoring the situation, according to the government's SharkSmart app.

On Thursday, a 3-metre, significantly decomposed partial whale carcass washed up at South Cottesloe beach, triggering the closure of all beaches in the area.

The remains were buried at the Red Hill Waste Management Facility.

On September 27, a 13-metre, 72-tonne humpback whale carcass washed up on South City Beach, requiring an excavator to remove it.