Bass Coast Crime Investigation Unit are appealing for assistance from the public as they investigate an assault that occurred in Inverloch in January.
It is believed the victim, a 20-year-old man from Inverloch, was outside a licensed premises on A'Beckett Street when he was approached by an unknown man about 12.25am on Friday 26 January.
It is understood the two men had a verbal argument before the male offender struck the victim to the head, causing him to fall unconscious.
The victim sustained minor injuries and was taken to hospital for observation.
The man is perceived to be Caucasian in appearance, about 30 years old, wearing a t-shirt, shorts and a tattoo covering his left forearm.
Investigators have released CCTV footage of a man who may be able to assist with enquiries.
Anyone who witnessed the incident or with CCTV footage is urged to contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au