Perth's miserable form continued when they succumbed by 57 points to an East Fremantle side littered with AFL-listed talent at East Fremantle Oval on Saturday.
The Demons started slowly and never seriously challenged their opponents, who led at every change to win an uninspiring contest 17.11 (113) to 9.2 (56).
The win gave the Sharks a 6-3 season record and kept them right in the hunt for a top-four finish ahead of next week's derby clash with South Fremantle at the port.
Perth remain winless after nine games of the 2010 season and have only a mathematical chance of reaching the finals for the first time since 1997.
But they are showing no signs of making a miracle run towards September and the pressure continues to mount on coach Andrew Jarman.
East Fremantle forward Ryley Dunn announced his return from a hamstring injury by kicking the opening goal of the game after taking a strong mark at the top of the goal square in the fourth minute.
The Sharks added the next three in quick succession before Perth finally opened their account through Fremantle draftee Justin Bollenhagen.
AFL-listed defenders Matt Spangher and Steven Dodd repelled nearly everything the Demons threw at them before quarter-time and played key roles in setting up the Sharks' commanding 29-point lead at the first break.
Demons veteran Scott Siekerka kept his side in the contest by nailing two set shots at goal during the second term and a goal to captain Steven Armstrong cut the margin to 15 points at half-time.
But East Fremantle broke clear in the third term, booting four goals to one for the term with former West Coast midfielder Jamie McNamara influential at the stoppages.
McNamara collected 30 possessions and was clean in his disposal in one of his best performances of the season.
The Sharks' hunted in packs in the midfield and had too many numbers running forward for Perth to stop.
Conversely, the lacklustre Demons were inaccurate by hand and foot and broke down across half-forward. They had just five scoring shots in the second half.
Dodd was among the Sharks' best players, often finding himself in space as opponent Matthew Ferguson chased kicks further up the ground.
West Coast forward Mitch Brown played out of the goal square and finished with four goals for the Sharks, as did Dunn.