The species is critically endangered in the wild, known only on Moturemu Island in the Kaipara Harbour.
The largest non-navigational harbour and the largest natural harbour in the world is New Zealand's Kaipara Harbour, at 947 km².
Malcolm Harbour | Sydney Harbour Bridge | Auckland Harbour Bridge | Darling Harbour | Portland Harbour | North Harbour | Portsmouth Harbour railway station | Cork Harbour | Cole Harbour | Wellington Harbour | Waitemata Harbour | Victoria Harbour | Rye Harbour | Kaipara | Coal Harbour | North Harbour Rugby Union | Cole Harbour, Nova Scotia | Coffs Harbour | Poole Harbour | Lyttelton Harbour | Langstone Harbour | Harbour Town | Harbour Defence Motor Launch | Harbour Centre | Hamilton Harbour | District Council of Franklin Harbour | Chichester Harbour | Bristol Harbour | Bal Harbour, Florida | Attack on Sydney Harbour |
The kauri timber industry was responsible for developing the area, with logs floated down the Kaukapakapa River to the Kaipara Harbour, where they were loaded onto ships for export.
According to Māori traditions, the waka Māhuhu-ki-te-rangi explored the upper reaches of the North Island north of the Kaipara harbour during early Māori settlement of New Zealand.