Of 30 people stopped by fisheries officers in an operation on the Far North's west coast all but a few were found to be breaching the rules - and most were locals.
The fisheries compliance patrol at Kawerau and Tauroa on Northland's west coast yielded disappointing results, with non-compliance noted for almost 100 per cent of inspections.
Earlier this month, a combined team of North Shore and Northland fisheries officers converged on Kawerau and Tauroa, areas well known for high levels of offending.
Team manager fisheries compliance for the Upper North Island Steve Rudsdale said the patrol conducted inspections to assess compliance with fishing rules.
"The most disappointing aspect of the patrol was that of the 30 or so people we came across, almost all were not complying with the rules," Mr Rudsdale said.
"This area is a well-known spot for high levels of offending and offenders are often experienced poachers. More often than not, they are also street-wise and uncooperative."