Three Northland men with nearly twice as many oysters as they were legally allowed have been nabbed and face a fine.
Fisheries officials were tipped off to the illegal seafood gathering by an alert security guard at Opua just before midday on Wednesday.
Ministry for Primary Industries Northland compliance manager Darren Edwards said a Bay of Islands security firm contacted officials after they were concerned about a group of men who were diving for oysters in the Opua Marina area. The security guard followed the men in a vehicle once they had finished diving.
With the help of police the vehicle was stopped.
When inspected by Fishery Officers they found 1400 oysters which had been gathered by three divers.