Listen Now: 
February 07, 2026
From little things big things grow: the fight against sea bed mining
Matthew Tukaki
Posted On February 7, 2026
“Toitu te Tiriti, Toitu te Mana whenuua, Toi =tu Te Tangata”
They were the words spoken outside a mining office: “Representatives from Taranaki iwi Ngāti Ruanui and Greenpeace activists from Aotearoa and Australia interrupted the Annual General Meeting of Manuka Resources in Sydney. The meeting was eventually abandoned. Manuka Resources owns Trans-Tasman Resources, which has tried and failed to start seabed mining in the South Taranaki Bight. TTR is trying to revive its zombie project via the Luxon government’s Fast Track Process, but now they know that they will face resistance wherever they are.”
Now – after a fight spearheaded by a small Iwi – you could liken the fight to a battle between David and Goliath – another win: After more than a decade of legal challenges, protests and community resistance, opponents of deep-sea mining off the Taranaki coast marked a significant moment in late January with a Fast Track expert panel draft decision rejecting the seabed mining proposal put forward by Trans-Tasman Resources (TTR). The decision – described by environmental groups, iwi and coastal communities as a major victory – capped years of resistance that has seen Ngāti Ruanui and allied supporters on the front line from the very beginning.
The TTR application sought consent to extract millions of tonnes of iron-rich sand from the seabed in the South Taranaki Bight. Under the proposal, an industrial dredge would vacuum up to 10’s of thousands of square metres, processing the material to extract valuable minerals and returning the remainder back into the ocean. According to critics, this would equate to sustained industrial disturbance of a large and sensitive marine environment – with potential impacts layered across marine ecosystems, cultural values, customary fishing areas and the rights of coastal iwi.
From the outset, Ngāti Ruanui have been vocal opponents of the proposed mine. The iwi was among the first to articulate the deep cultural and environmental concerns associated with seabed mining, grounding their opposition in whakapapa, kaitiakitanga (guardianship) and long-standing connections to te moana.
“For over a decade, Ngāti Ruanui have watched a company, with no seabed mining experience, enter New Zealand, make grandiose claims, and then repeatedly falter at even the slightest hint of scrutiny.”
Ngāti Ruanui representatives have repeatedly emphasised that while the company stood to benefit financially, the risks were borne by coastal communities and their taonga ecosystems. As one iwi statement put it: “The risk is all ours – the profits are all theirs.”
This stark framing underlines a central argument long advanced by opponents: that commercial gain should not come at the expense of environmental sustainability, cultural integrity and the wellbeing of future generations.
The TTR proposal has faced years of legal scrutiny. Initial permits granted by local authorities were appealed on multiple grounds, including environmental risk assessments and Treaty obligations. The matter eventually progressed through higher courts, including the Supreme Court, which underscored deficiencies in earlier consent processes, particularly around environmental protection standards and consultation obligations.
The protracted battle introduced a series of legal tests that forced successive decision-making bodies to reassess how large–scale marine extraction projects should be evaluated – not only in ecological terms but also in relation to communities who depend on and intersect with those ecosystems.
Last week’s draft decision by a specialist Fast Track panel marks perhaps the most pivotal regulatory defeat for the project to date. The panel found that the environmental risks associated with seabed mining – including sediment plume effects, disruption to benthic habitats and potential harm to threatened marine species – could not be reliably avoided or mitigated, even with stringent conditions attached.
The draft decision stated that environmental impacts “are sufficiently significant to be out of proportion to the project’s regional or national benefits,” and reaffirmed serious concerns about threats to highly vulnerable species and ecological processes.
This outcome was widely welcomed by iwi, environmental groups and coastal communities, many of whom have called for a full national ban on seabed mining in Aotearoa.
Opposition to the mining proposal has not been based solely on abstract ecological concerns. For iwi like Ngāti Ruanui, the moana – and the South Taranaki Bight in particular – is a living entity with deep cultural and spiritual significance. Marine mammals, fish, seabirds and interconnected ecosystems are not commodities; they are part of an ancestral landscape where cultural practices, customary fishing and intergenerational knowledge transfer take place.
Critics have repeatedly warned that seabed mining could disrupt sedimentation patterns, block traditional food gathering areas and undermine the mauri (life force) of cherished marine environments.
The scale of daily seabed disturbance – dredging 20,000 square metres at a time – was frequently cited as evidence the operation would be too industrial and too disruptive to align with sustainable environmental stewardship.
The opposition to seabed mining has been far broader than tribal boundaries. Groups such as Kiwis Against Seabed Mining (KASM), environmental organisations, fishing associations and coastal residents have worked alongside iwi to amplify concerns and mobilise nationwide support.
Activists have pointed to parallel struggles across the Pacific, noting that coastal and island communities throughout Oceania have also resisted deep-sea extraction projects, viewing them as threats not only to ecosystems but to cultural continuity and food security.
Although the Fast Track panel’s decision is currently at the draft stage, many view it as a watershed moment in New Zealand’s approach to seabed mining and marine governance. If upheld in its final form, the decision could set a precedent for how large-scale marine extraction proposals are evaluated – shifting emphasis toward precaution, community rights, ecological protection and meaningful participation by iwi and hapū.
For Ngāti Ruanui and allied communities, this moment is not just regulatory vindication – it symbolizes a long-term struggle grounded in kaitiakitanga and collective responsibility. It underscores that when communities stand firm, legal and cultural frameworks can be aligned to protect moana and uphold values beyond commercial calculation.
The debate over seabed mining may not be over, but this chapter affirms that voices from the coast – rooted in whakapapa and environmental stewardship – remain central to how Aotearoa defines its relationship with the sea.
RELATED NEWS
