Police are looking for one of three men involved in a fight on Bath Street last Friday night (7 May).
It started outside ChordZ Coffee House and continued up to the Soleil pub at around 11:30pm.
Officers say two men were throwing punches at each other with another man then getting involved.
Two of the men, aged 18 and 27, were arrested at the scene but the third man ran off into French Lane.
He's described as being in his late teens or early twenties, slim, and wearing a dark sports jacket with a white stripe down the side.
The two men arrested have been released, with one still on bail.
Police say there were lots of people in the area at the time, with one person recording the arrest outside Redvers.
They want to speak to anyone who saw or recorded what happened.
Anyone with information is asked to call police on 612612 or Crimestoppers anonymously on 0800 555 111.
Government appoints new Havre Des Pas Lido operator
Jersey Chamber of Commerce 'aghast' at recommendation to reject Strive Hotel plans
Politician calls for Havre des Pas lido tender process to be scrapped
Two Jersey rowers make Team GB
Jersey's rate of inflation rises slightly over summer
Committee calls for Deputy Philip Ozouf's suspension
Baby sloth at Jersey Zoo orphaned as mother unexpectedly dies
DFDS contract reveals termination clause and performance penalties
