Was this a creative effort to promote the fruit industry? Or perhaps Perth had sold out of pumpkin costumes for Halloween.

Those who kept their eyes peeled (boom, boom) in East Fremantle on Sunday might have come across the puzzling sight of 50 men dressed in banana costumes.

Sporting the unmissable yellow outfits, the lively bunch were seen cycling through the main streets, flanked by a friend in a monkey suit.

One of the bananas in question, Marcus Haines, told thewest.com.au the gathering was a leaving celebration for the monkey, 23-year-old Sandy Milne from East Fremantle, who is heading to Japan.

Camera Icon The group stopped at five houses during their seven-hour get together. Credit: Marcus Haines

Mr Haines said the group regularly had a “Tour de Fridge” get together, riding their bicycles between each other’s homes with a drink at every stop.

To mark his departure, Mr Milne had decided this particular “Tour” should involve costumes.

“He made a Facebook event and we all bought the costumes online, it was great everyone was committed,” Mr Haines said.

“It was purely for gags.”

The bananas enjoyed five stops at friend’s houses and turned heads around town, where onlookers took photographs and video footage to share on social media.

“I so wish I'd been able to get a photo. It was quite a sight! Must have been about 30 of them or more,” one confused Facebook user wrote.

One of the men had even gone a step further, painting his chest yellow for the seven-hour extravaganza because his banana costume hadn’t arrived in time.

In a hilarious stunt, Mr Milne had also arranged for the group to swarm the Palmyra BWS store, only to be chased out by him in his monkey get-up.

The footage was captured on the store’s CCTV cameras.

“The guy who works there, he was pretty shocked when it happened but it’s not the weirdest thing to happen at that store,” he said.

See more in the video at the top of the page.