"In another recent incident, an all-terrain vehicle was seized at an MPI checkpoint after two men in the vehicle were allegedly found with more than 500 mussels. The daily limit for green-lipped mussels is 50 per gatherer in the Northland area," he said.
"These incidents should serve as a warning.
"We don't plan to reduce our efforts in this area. We know the areas where most offending occurs and we will be out there, catching people. There are specific rules around what can and can't be taken in terms of shellfish. We hear a lot of excuses and reasons for offending and ignorance will never be accepted as a valid reason."
Mr Rudsdale said If people are in doubt about the rules, they can visit the MPI Fisheries Northland Facebook page and ask any questions. "We are always happy to help," he said.
People can report poaching, suspicious, or illegal activity by calling 0800 4 POACHER (0800 47 62 24) or email poacher@mpi.govt.nz.