Learn about the different marine habitats protected by the two sites - Waikaraka and around Motukaroro / Passage Island at Reotahi.
Entrance to Whangarei Harbour
The 227.5ha marine area at Waikaraka is almost entirely mangrove forest with associated intertidal mud flats and a subtidal channel edge. Being one of nature’s most highly productive zones, the gentle flowing waters and mud surrounding mangrove roots are home and nursery to many organisms - fish and shellfish as well as crabs, worms and shrimps.
Fish like snapper, trevally, kahawai, kingfish and mackerel spend important parts of their lives among mangroves, so the protection of marine reserve status here supports the fish population throughout the harbour. The Waikaraka mangroves also provide habitat for over 80 species of birdlife, some very rare.
One of the special features of this 26.2 ha reserve is the abundance and diversity of the marine life in the waters around Motukaroro Island. The combination of deeper water and swift current flows has produced a diverse assemblage of reef-fish quite unique in a harbour environment.
The surrounding seabed is rocky, with large areas of kelp providing a haven and feeding ground for an unusually high variety of fish.
On the westward point of the island there is a large fragile environment of filter feeders, including anemones and sponges, whose brilliant colours are stunning and provide a spectacular dive.