Cole Miller’s grieving friends in the water polo community have come together with a new social media movement to honour the one-punch assault victim.

His devastated Brisbane Barracuda water polo team-mates are leading the way on Facebook, Twitter and Instagram with #CozziesOutForCole – encouraging people to hang out their swimwear.

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It has taken its cue from the #PutOutYourBats movement for cricketer Phillip Hughes following his death in 2014.

The #CozziesOutForCole campaign follows the death of Mr Miller in the Royal Brisbane and Women’s Hospital on Monday morning after being hit once in the back of the head in an alleged random attack in Brisbane’s Fortitude Valley.

The two men accused of the attack have been remanded in custody, charged with unlawful striking causing death.

“This is an initiative driven by our players,” Brisbane Barracudas Water Polo wrote on Facebook.

“Get behind us and put your Cozzies out for Cole, a champion taken too soon.

“In loving memory of this beautiful young man who lost his life.”

Dozens of photos have already been shared on Facebook, Twitter and Instagram.

Mr Miller, originally from the Sunshine Coast, had been involved in water polo for most of his life.

He was in his second season with the Brisbane Baracudas in the national water polo league at the time of his death.

Waterpolo Australia CEO Christopher Harrison tweeted Mr Miller’s passing was “a dark day for our sport”.

Mr Miller is the younger brother of Australian water polo player and Olympian Billy Miller.