Lincolnshire Police have released an appeal for witnesses to an assault at the Fever nightclub in Lincoln in July.
The incident occurred inside the club on the dance floor at around 3.10am.
The victim, a man in his 30s suffered a facial injury.
A police spokesperson said the force is looking to speak to the man pictured in the above CCTV image as they believe he may be able to assist with inquiries.
They said: “We believe he is around 6ft tall, of a slim build, has short ginger hair, a ginger beard and a sleeve tattoo.
“Anyone with information should call 101 quoting incident 76 of July 1. Alternatively to report anonymously please call Crimestoppers on 0800 555 111.”