A 22 year old man suffered severe facial injuries while trying to break up a fight outside Ballare nightclub, popularly known as Cindies, last Saturday.
His mouth was so seriously hurt that he is now unable to speak.
Police have described the man’s attacker as between 18-22 years, mixed race, approximately 5ft10in, and wearing a black baseball cap.
Detective Sergent Lindsay Harbour said: “I would urge anyone with information to contact me. In particular a woman who also tried to prevent the altercation.”