The Bluff wild oyster fishery has been given the all clear for a fatal parasite that could have shut down operations in the region.
The Ministry for Primary Industries on Tuesday said it had found no sign of the Bonamia ostreae parasite, which was discovered in Stewart Island waters in May this year.
"This is great news for the local industry and everyone involved in the response," said the ministry's Geoff Gwyn.
The next round of surveillance is scheduled for December and January.
May's discovery led to the removal of all farmed oysters in Big Glory Bay, Stewart Island and Marlborough.
Stewart Island farmers completed the removal of oyster lines from Big Glory Bay on September 6 and removal operations in Marlborough are ongoing.
Bonamia ostreae has been present in Nelson and the Marlborough Sounds since 2015.