A 76-year-old was assaulted during an argument between two men over an unleashed dog.
Police are calling for witnesses after the incident at South Arm Neck in the south of the state on Friday about 6.30pm.
The victim was left with facial injuries as a result of the altercation.
Police would like to speak with a man of Caucasian appearance, in his mid 20's, about 170cm tall, slim build, sandy short cropped hair and of fair complexion with no facial hair.
He was wearing light blue long trousers, and a short-sleeved polo.
At the the time of the assault the man was walking two dogs with a woman, and the couple were seen driving what was believed to be a beige Toyota Landcruiser troop carrier.
Anyone with information should contact police on 131 444 or Crime Stoppers on 1800 333 000.