A launch caught fishing in a marine reserve and divers with undersized scallops were among the busts by police and fisheries officers in a joint operation in the Bay of Islands.
This summer Far North police have borrowed a rigid inflatable boat normally based at Auckland's maritime police unit. It has been getting plenty of use - including the rescue of woman injured when a yacht was smashed ashore on the Cavalli Islands - and last week it was used in another operation with Ministry for Primary Industries to identify illegal fishing.
In particular, boaties were caught and fined for taking undersized and excess scallops, Senior Sergeant Chris McLellan said.
Anglers on a large launch caught fishing in a marine reserve at Deep Water Cove, near Cape Brett, were likely to receive a formal warning.
Marcie Cooke, the ministry's chief compliance officer in Northland, said it was disappointing but the people apprehended were not from the area, did not know about the fishing ban at the cove, and had not caught anything.