A man is still in a critical condition three months after he was assaulted in the early hours of the morning.
The 30-year-old was assaulted outside the Harbour Hotel in Kings Road, Brighton, between 3am and 3.45am on June 17.
An 18-year-old man was arrested on suspicion of grievous bodily harm and has been released on conditional bail whilst enquiries are ongoing.
And although officers are not looking to identify any further suspects, they believe the man pictured may have witnessed the assault and ask him, or anyone who recognises him, to get in touch.
Anyone with information that could help the ongoing investigation is asked to contact Sussex Police online or via 101 quoting Operation Farden.