The body of a man has been found floating in the water off D'Urville Island, near the northern tip of the Marlborough Sounds.
Police said a couple who had moored their yacht discovered the body floating in the water in Greville Harbour, off D'Urville Island.
There was another yacht moored 100 metres away and police believed the dead man had come from the boat.
The couple managed to pull the body from the water into a dinghy and secured it until police arrived on a Coastguard launch about 3.30pm yesterday.
An autopsy was due to be carried out today, however police said they believed the death was not suspicious.