A new marine reserve is proposed north of Waiwera.
The Mahurangi Action group, suggesting a Mahurangi Coastal Trail linking Wenderholm, Te Muri and Mahurangi regional parks, is also keen to establish a 944 hectare marine reserve adjacent to those parks.
"This review of the Auckland Regional Parks management plan is an appropriate time to invite discussion of a Mahurangi marine reserve, and its potential boundaries, such as between the natural sentinels of Pudding Island, off Cudlip Point, and Mahurangi Island, off Waiwera," group spokesman Cimino Cole says.
The idea of a Mahurangi marine reserve has been kicking around for 25 years.
One was included in a reserves network developed by Omaha marine biologist Dr Roger Grace and presented for consideration in the Hauraki Gulf Marine Park spatial plan process.
The network was designed to cover all sigificant gulf habitat and close enough to allow movement between them. This is a first draft discussion document and the outlined areas in the gulf network are indicative only, Grace says.
The Mahurangi Action group is using the map Grace drew up for the Mahurangi shoreline as a discussion starting point.
It includes much of the Puhoi River and Te Muri estuary, with mangroves and salt marsh habitat, extensive shallow reefs off Wenderholm and Te Muri, as well as horse mussel beds at the Mahurangi Harbour entrance.