The un-named man and his elderly father went snorkling near Clay Island and after one of the dives, the younger of the two men didn't resurface.
Search crews were brought in late last evening after the father managed to make it to shore in the boat. The search was conducted by the Joint Rescue Co-ordination Centre in Halifax with the help of a helicopter from CFB Greenwood, the Coast Guard Inshore Rescue Unit, the Chester Fire Department and the RCMP. The search was called off around 2:30 this morning.
The investigation continues.
The search is resuming this morning.