The Ministry for Primary Industries (MPI) has announced a new independent review into previous operations investigating the illegal dumping of fish.
It comes after leaked reports raised fresh questions around the potential scale of the problem - and how MPI has responded to it.
MPI director general Martyn Dunne said there had been "much comment" this week around an MPI compliance investigation, dubbed Operation Achilles, into potentially illegal discarding of fish by some South Island-based fishing vessels in 2012 and early 2013.
Yesterday, NewsHub reported one of two leaked reports, focused on Operation Achilles and written by an MPI investigator, estimated that 20 to 100 per cent of some quota fish were being dumped each time the net came on four of the five vessels monitored.
The Green Party responded by claiming MPI was "looking the other way" and called on the Government to overhaul the quota management system that regulates the industry.