No comments yet

Invasive marine pest in Hauraki Gulf Marine Park

Two species of exotic caulerpa seaweed have been found in the north of New Zealand, including in Tāmaki Makaurau. This invasive marine pest has the potential to seriously harm and transform our coastal environments.

If you think you see exotic caulerpa, note the location, take a photo and report it to Biosecurity New Zealand on 0800 80 99 66 or online at

As of October, exotic caulerpa has been found in these Hauraki Gulf Marine Park locations:

  • Aotea Great Barrier Island: Blind Bay, Whangaparapara Harbour, Tryphena Harbour and southern Port Fitzroy
  • Ahuahu Great Mercury Island: between Ahikopua Point and Maunganui Point
  • Kawau Island: Iris Shoal
  • Waiheke Island: Onetangi Bay and around Thompsons Point

If you are boating, there is no anchoring and fishing in these areas. In the Auckland region, a Controlled Area Notice is in place at Aotea Great Barrier Island. There are rāhui in Aotea Great Barrier Island​ and Waiheke Island with similar restrictions.

Visit Auckland Council and Biosecurity New Zealand for more information.

Image credit: NIWA