Mr Harper said the increase might be related to a heightened amount of boats and craft on the water. 

When it came to harvesting in 2018, Mr Harper noted produce worth between $3000 and $5000 had been stolen. 

He said it’s an issue which is prevalent throughout the year. 

As for cracking down on the culprits, Mr Harper and others have tried 24 hour surveillance in the past. 

“However it would drive anyone crazy,” he said. 

“We like to trust that people would do the right thing by us.” 

Operation Trident, a joint NSW Police and NSW Department of Primary Industries, including DPI Fisheries and the NSW Food Authority, is targeting the theft and illegal sale of oyster across NSW.

They are urging people to buy oysters from a reputable seafood retailer or directly from oyster growers.

“Stealing oysters could see you land in prison or face fines of up to $275,000,” a NSW Police spokesperson said. 

Despite frequent thefts throughout the year, Mr Harper has labelled the 2018/19 season a great one for oyster farmers. 

“We’ve only had one closure this season and no real hiccups,” he said. 

It’s the first time Mr Harper’s farm has run out of oysters to sell before the turn of the new year.

The good season comes as a relief to Mr Harper and others after farms were forced to close just before Christmas in 2017, due to a burst sewerage pipe.

If people suspect someone of stealing oysters they can call Crimestoppers on 1800 333 000.

To report suspected illegal fishing activity, call Fishers Watch on 1800 043 536, report it online at the DPI Website or through the FishSmart NSW app.