Local Pete Wilkinson noticed chunks in the water while kayaking in Kaiuma Bay last week.
Frost and cold weather early in the season led to smaller harvests from many vineyards in the area.
It's currently investigating what nutritional benefits the fruit may have.
It took emergency crews five hours to rescue him.
"The potential for unpruned vineyards is now in crisis."
There are no reports of injuries.
"We think the bylaw is unreasonable. It unfairly punishes tens of thousands of responsible Kiwis."
The 31yo failed to show up for work last month.
A concrete turtle missing from a playground in Nelson turned up in Blenheim, but is now safely back home.