On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Oceans

We aim to provide the knowledge needed for the sound environmental management of our marine resources.

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    Marine geological hazards

    Education Resource
    New Zealand faces a variety of hazards associated with undersea geological activity.
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    Mountains in the Sea: the Louisville Seamount Chain

    We are currently steaming out towards our survey area, the Louisville Seamount Chain, which is about 1500 km from Wellington.
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    Population modelling software

    Casal2 is an advanced software package developed by NIWA for modelling the population dynamics of marine species.
  • South coast waves

    Wave hazard research

    Research Project
    NIWA collects wave data, develops and verifies wave forecasting systems, and is developing and producing wave projections.
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    Coralline Algae

    This identification guide covers the common crustose coralline algae found in central New Zealand.
  • Critter of the week

    In this blog series, we feature a new critter from our expansive invertebrate collection including pictures of specimens in their unique habitat. The blogs also feature news, links and fun facts that showcase New Zealand’s fascinating marine fauna.
  • Rig shark

    Research Project
    Rig shark is an important inshore commercial fish species in New Zealand, and we need to understand more about their habitats, movements, nursery grounds and vulnerability to human impacts to ensure they are managed sustainably and their productivity is enhanced.
  • What is Ocean acidification?

    NIWA oceanographer Dr Cliff Law explains the impacts of ocean acidification on organisms that use carbonates to build their shells, and on bacteria.
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    New map reveals New Zealand’s seafloor in stunning detail

    News article
  • “Very rare find” of ghost shark hatchling

    Media release
    NIWA scientists have made the rare discovery of a days-old ghost shark during a recent survey off the east coast of the South Island.
  • Splendid Sponges (Intertidal)

    An interactive guide to the intertidal sponges of New Zealand.
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    When the sea gives back – a story of luck and decency

    Media release
    NIWA puts a lot of things in the ocean—instruments tied to moorings, floats that dive up and down measuring what’s going on in the water, and video cameras that monitor fish.