Two fishing companies have pledged to change the way they operate on the North Island's west coast, in a bid to safeguard the future of the endangered Maui's dolphin.
There are thought to be less than 100 of the world's smallest dolphin left.
They are only found off the west coast of the North Island in relatively shallow waters.
As a result, Moana New Zealand - the largest Maori owned fisheries company and half owner of Sealord - and operator Sanford have pledged to stop conventional trawling within the 100m depth contour by the end of 2022.
They will also end set netting and trawling out to a depth of 100m north of New Plymouth from October next year, and will spend $500,000 to put video monitoring equipment on all vessels.
"We all have a role to play in protecting these mammals," said Sanford's Volker Kuntzsch.
"Our livelihoods depend on what’s out there in the oceans, and that does not only mean on the species we catch, but the health of the whole ecosystem."
The companies have pledged to work with operators whose catching rights are affected.
Environmental groups have long criticised fishing companies and the government for not doing enough to protect the Maui's dolphin.