Hauraki Gulf – Connection with one of Auckland’s great backyards

Source: NZ Department of Conservation

It’s hard to believe that Tāmaki Makaurau / Auckland, our largest, busiest and most densely populated city in New Zealand hosts one of the most abundant and diverse marine parks in the world.

Our treasured Hauraki Gulf Marine Park, New Zealand’s only national park of the sea, is 1.2 million hectares and includes more than 200 islands and islets, including 47 pest-free islands where numerous endangered species can survive and thrive. On top of this, there is now 19 new protection areas – two marine reserve extensions, 12 new high protection areas, and five new seafloor protection areas in the Gulf.

Getting out on the water it didn’t take long to realise that lots of people have a strong connection to the marine park. It wasn’t just rec fishers out mid-week enjoying a spot of fishing, I saw boaties sailing and exploring the Gulf as well as plenty of visitors heading out to the islands, connecting with the wildlife that calls the Hauraki Gulf home.

As a new DOC staff member in an office role, and someone who’s lived in Auckland most of my life without even realising the marine park existed, it’s been pretty special getting out to see what Tāmaki Makaurau’s greatest backyards is actually like.

Out there, the city fades away surprisingly quickly. You’re surrounded by islands, seabirds wheeling overhead, and a sense that there’s a whole other world beneath the surface.

That connection to the ocean is exactly what Seaweek celebrates – the idea that people, wildlife and the environment are all linked. And it’s also what the new marine protections for the Hauraki Gulf Marine Park aim to support for years to come.

A special place beneath the waves

The Hauraki Gulf / Tīkapa Moana / Te Moananui-ā-Toi is one of Aotearoa’s most loved marine environments. It’s home to an incredible variety of marine life and habitats – from rocky reefs and kelp forests to seagrass meadows and shellfish beds.

These habitats support the species many people care about when they head out on the water. Fish like snapper, kahawai and trevally are a big part of the Gulf’s fishing culture. Divers and snorkellers get to explore underwater forests of kelp and rocky reefs teeming with life.

But like many places around the world, the Gulf has been under pressure.

Sediment washing into the sea, pollution, habitat loss and fishing pressure over many years have taken a toll on parts of the marine environment. Some shellfish beds have declined, seagrass meadows have shrunk, and in some places kelp forests have been replaced by “kina barrens” where sea urchins dominate and not much else grows.

When habitats struggle, the species that rely on them struggle too.

That’s why there’s been a big push in recent years to revitalise the Gulf.

A boost for the Gulf

A major step forward came in late 2025 with the introduction of new marine protections across the Hauraki Gulf Marine Park.

The new network includes 19 marine protection areas spread across the Gulf. These include marine reserve extensions, high protection areas and seafloor protection areas. Together they represent the biggest increase in marine protection in Aotearoa in more than a decade.

These areas were chosen because they protect important habitats and ecosystems – places that are especially rich in marine life, rare, or particularly important for the health of the wider Gulf.

Some areas protect rocky reefs that support thriving underwater communities. Others protect seafloor habitats like seagrass meadows or shellfish beds that act as nurseries for young fish.

Protecting these places helps rebuild the foundations of the Gulf’s marine ecosystem.

What the new protections mean

The different protection areas each play a role in helping marine life recover.

Marine reserves offer the highest level of protection. No fishing or removal of marine life is allowed, but people can still visit, snorkel, dive or explore the area. These reserves often become incredible underwater hotspots where marine life can thrive.

High protection areas are designed to give ecosystems a chance to bounce back. Fishing and the removal of natural materials are mostly prohibited, though authorised customary fishing by tangata whenua can continue.

Seafloor protection areas focus on protecting sensitive habitats on the seabed. Activities that damage the seafloor, like bottom trawling or dredging, are restricted, while low-impact activities like line fishing, diving and spearfishing can still happen.

Importantly, most of the Hauraki Gulf is still open to recreational fishing. The aim isn’t to shut people out, but to protect key parts of the ecosystem so the Gulf stays healthy into the future.

Why marine protection helps

Marine protection is one of the most effective tools we have to help ocean ecosystems recover.

In protected areas, fish often grow bigger, populations increase and ecosystems become more balanced. Over time, some of those fish move into nearby areas where fishing is allowed – something often called the “spillover effect”.

Healthy habitats also play a huge role in supporting fish populations. Seagrass meadows and shellfish reefs, for example, act like underwater nurseries where young fish can grow before heading out into deeper waters.

Looking after these habitats helps ensure the Gulf continues to support the marine life – and fishing experiences – that people value.

Working together for the Gulf

The new protections are just one piece of a much bigger effort to revitalise the Hauraki Gulf.

Restoring the Gulf also means tackling the pressures that come from land, such as sediment runoff and pollution, as well as restoring habitats like mussel reefs and improving fisheries management.

Tangata whenua have played an important role in shaping the protections and continue their role as kaitiaki of the Gulf, bringing generations of knowledge and care for this special place.

DOC rangers will also be working on the water and with local communities to help people understand the new protections and where they apply.

Revitalising the Gulf will take time, but every step helps move things in the right direction.

Staying connected to the ocean

Spending time out on the water really drove home just how important the Hauraki Gulf is to so many people.

For some it’s about fishing with mates or family. For others it’s sailing between islands, exploring a new beach, or diving beneath the surface to see what’s there.

These experiences shape the way we connect with the ocean.

By protecting important parts of the Gulf, we’re helping make sure those experiences are still possible for future generations – so kids growing up in Tāmaki Makaurau and visitors from all over New Zealand and the world can discover the amazing marine life beneath the waves just like people do today.

Seaweek is a great reminder that everything is connected – the land, the sea, wildlife and people.

The new marine protections in the Hauraki Gulf are all about strengthening those connections and helping this incredible ocean backyard thrive for years to come.

MIL OSI