Officers want to speak to the man in connection with the incident, which happened on Friday 18 August 2017 at the One Stop Shop in Newborough.
Between 12.30pm and 12.45pm, a man entered the store and was seen to place sausages, cheese and cider into a black bag and head towards the single entry / exit door of the store. The store manager attempted to stop the man leaving the store, when he became aggressive and punched the male store owner in the mouth, causing a cut to his upper lip.
Anyone who recognises the man in the image or who has any information, is asked to contact police. Dial 101, press 2 and ask to speak to PC Gallagher-Barrass.
Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.