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A couple of months back a new invasive seaweed known as caulerpa was discovered in a number of locations in the Bay of Islands.
It has been detected in the waters around Aotea Great Barrier island, Great Mercury Island and Northland, and it's now made its way to Kawau Island
In response, the Ngāti Manuhiri Settlement Trust is taking action to eradicate the invasive, fast-growing species.
Their efforts include a roadshow that will teach participants how they can assist with their mission.
It's coming to Waitangi on Saturday, Tāmaki on Monday, and Hauraki next Wednesday.
Nicola Macdonald, co-chair of The Hauraki Gulf Forum speaks to Jesse.
A new sign of the times at Omākiwi Cove, Bay of Islands. Photo: LDR / Susan Botting