You could try contacting Loz79 - www.seabreeze.com.au/Members/Profile/Details.aspx?member=Loz79
he has his finger on the pulse up there, i think. 
Or these peeps in the local SUP club should be able to advise. Looks like a fun crew.
www.facebook.com/4670SUPCLUBINC/ 
It's a nice part of the world.
Nothing much to worry about, we are not in tropical waters, get the occasional blue bottles but that's about it...a Few stories about some rare nasties around in the past around but nothing really 100% confirmed....
