Central Coast scored four second-half goals in a 5-0 thrashing of the Glory at Sydney Football Stadium, extending Perth's run of defeats to seven.
Goals to Royston Griffiths, Matt Simon, Adam Kwasnik and Matthew Lewis – and an own goal to the hapless Naum Sekulovski - lifted the Mariners into third spot and continued Perth's alarmingly form slide.
It was the biggest win in Central Coast's history – a feat made even more remarkable by the fact Graham Arnold's men were playing just their third game in 29 days.
Despite a lack of football recently – and being forced to play a home game in Sydney due to ground repairs at Gosford – the Mariners looked by far the sharper of the two teams.
Glory were devoid of inspiration, confidence and any great enthusiasm.
Ian Ferguson's team got what they deserved in the end and one wonders where to from here for the one of the form teams of the early season.
Oliver Bozanic drifted a free kick into the box where the Western Australian-reared Griffiths found himself in acres of space to head home a simple goal to open the scoring on 37 minutes.
The breakthrough had been coming for some time and it was no surprise when the lead was doubled on the hour.
Daniel McBreen muscled his way into the box and unselfishly glided a pass across goal for Matt Simon to complete the simple tap in.
Kwasnik nailed the lid shut with his 20th goal for the club, finishing off some fine lead-up work from Alex Wilkinson and McBreen.
Matthew Lewis' first A-League goal four minutes from time was followed by Sekulovski's clumsy own goal at the death.
It capped off a tremendous team performance from the Mariners, albeit against an insipid opponent.
Central Coast 5
Griffiths (37m), Simon (60m), Kwasnik (77m), Lewis (86m), Sekulovski (89m og)
Perth Glory 0