Fish

Latest news

Research finds microplastics in fish muscle tissue

18 March 2021

Some of the first research into how microplastics are affecting New Zealand fish species has revealed that microplastic fragments can find their way through the gut lining and into muscle tissue.

Queen of the critters

Feature story

11 February 2021

Sadie Mills has come a long way from scaring the inhabitants of Scottish rock pools. Sarah Fraser explains.

Oceanic shark numbers decline amid research gaps

Media Release

3 February 2021

A lack of information about New Zealand oceanic shark populations is making it difficult to assess how well they are doing, says a NIWA researcher.

How does a fish climb a ramp? Very, very cleverly…

Feature story

18 January 2021

New Zealand’s native fish are doing their best to climb up ramps in a NIWA laboratory so scientists can learn how to better help them navigate our tricky waterways.

Our work

Ecosystem influences on snapper

NIWA has a number of projects that are allowing us to better understand the interaction between snapper and their environment over their life cycle.

Changes in juvenile fish habitats

NIWA is looking for people who have had a long association with the Hauraki Gulf or Marlborough Sounds to help them with a research project on juvenile fish habitats.

NIWA is in its third year of a 5-year phased project on the deepwater line fishery in Tonga funded by the NZ Aid Programme’s Partnership for International Development Fund. The aim of the project is to deliver the improved governance, management, and economic and biological sustainability of the fishery focusing on deepwater snapper and bluenose in the Tonga EEZ.

New Zealand fish passage guidelines

The New Zealand Fish Passage Guidelines sets out recommended practice for the design of instream infrastructure to provide for fish passage.

Latest videos

The world's most mysterious fish

A video about The world's most mysterious fish. NIWA researchers are working with iwi to try to unlock the secrets of New Zealand tuna—freshwater eels. Every year tiny, glass eels wash in on the tide at river mouths along our coast. But where do they come from and how do they get there?

Science on the high seas

Sustainable fisheries depend on good scientific data about fish stocks. NIWA scientists head out into Cook Strait on Research Vessel Kaharoa to survey the hoki fishery and advise officials on catch rates.

Freshwater fish swim their all for science

The tiny inanga have been plucked from Waikato streams and held in a darkened laboratory for the last month, undertaking highly advanced testing to find the strongest, fittest and fastest fish.

Ocean acidification—what is it?

The on-going rise of carbon dioxide (CO₂) in the atmosphere is not only changing our climate—it is also changing our oceans. Take a look at the work of the NIWA-led CARIM project into what these changes may mean for the delicate balance of marine life.

A helping hand for lamprey at instream obstacles

At night, in the NIWA lab in Hamilton, lamprey have been climbing structures to help scientists understand how they can navigate waterways.

Staff Profile: Cindy Baker

I am a Principal Scientist of freshwater fish. I specialise in fish ecology, particularly lamprey (kanakana/piharau) and whitebait species, and the use of pheromones/semio-chemicals for population monitoring, enhancement and control.

Research finds microplastics in fish muscle tissue

Media Release

18 March 2021

Some of the first research into how microplastics are affecting New Zealand fish species has revealed that microplastic fragments can find their way through the gut lining and into muscle tissue.

Queen of the critters

Feature story

11 February 2021

Sadie Mills has come a long way from scaring the inhabitants of Scottish rock pools. Sarah Fraser explains.

Oceanic shark numbers decline amid research gaps

Media Release

3 February 2021

A lack of information about New Zealand oceanic shark populations is making it difficult to assess how well they are doing, says a NIWA researcher.

How does a fish climb a ramp? Very, very cleverly…

Feature story

18 January 2021

New Zealand’s native fish are doing their best to climb up ramps in a NIWA laboratory so scientists can learn how to better help them navigate our tricky waterways.

Scientist spots shark sperm storage strategy

Feature story

6 January 2021

A NIWA researcher has found the first evidence that female deep sea sharks store sperm as a strategy to preserve the species and possibly avoid aggressive mating encounters.

2021 - Antarctic voyage

RV Tangaroa is undertaking a 45-day voyage to the Southern Ocean and Ross Sea in early January and returning by February 16, 2021.

Scientists conducting snapper research off North Island’s west coast

Media Release

6 October 2020

People along the Kapiti and Wanganui coast may spot NIWA’s research vessel Kaharoa operating close to shore in the next few weeks as scientists carry out a survey of snapper, tarakihi, red gurnard and John Dory.

New freshwater species programme

A new programme at NIWA will focus on finding ways to protect our freshwater species now and in the future.

Updated freshwater pests guide out now

NIWA has updated its guide to freshwater pests for the first time since 2013.

Freshwater species show vulnerability to climate change

Media Release

15 September 2020

A new study has identified seven freshwater species native to Aotearoa-New Zealand that will likely be highly or very highly vulnerable to climate change.

NIWA scientists make salmon farming breakthrough

Media Release

9 September 2020

NIWA scientists have made a breakthrough that may underpin expansion of the high-value New Zealand salmon farming industry.

Making Waves - Sep 2020

Welcome to the September edition of Making Waves. As always, our commitment is to deliver quality science for the benefit of New Zealand.

Maniapoto Cultural Assessment Framework

Maniapoto Māori Trust Board and NIWA worked collaboratively during 2018-19 to support Ngāti Maniapoto whānau to reconnect with and participate in the assessment of their freshwater according to their values.

Climate Change Vulnerability Assessment (CCVA)

To prepare for changes in climate, our freshwater and oceans decision-makers need information on species vulnerability to climate change.

Researchers on hunt for fish nurseries

Media Release

7 August 2020

NIWA researchers are heading out from Tasman early next week to survey an area thought to be home to important juvenile fish nurseries.

Getting the taste for kingfish

Feature story

28 July 2020

This award-winning kingfish sashimi dish is creating quite a splash – but it doesn’t come from the sea. We look at NIWA’s latest aquaculture success story and the new opportunities it’s on path to deliver.

Concepts in sustainable aquaculture - IMTA

Media Release

23 July 2020

New ways to address environmental sustainability challenges.

Freshwater species ecology and management

The abundance and diversity of life in our rivers, lakes and estuaries is the ultimate indicator of the health and wellbeing of our aquatic ecosystems. NIWA is helping to ensure that New Zealand’s unique and iconic freshwater species are healthy, abundant and thriving.

Making Waves - June 2020

NIWA is currently working closely with stakeholders to ensure that our research and advice are applied to maximum effect to assist with the recovery after COVID-19.

Tangaroa heads back to sea – with social distancing

Media Release

13 May 2020

NIWA’s flagship research vessel Tangaroa will sail out of Wellington Harbour on Sunday for the first scientific voyage since the lockdown.

The King of the Fish

Feature story

29 April 2020

Before fish Alvin Setiawan studied weta and penguins. These days he’s never far from the kingfish tanks at NIWA’s Northland Marine Research Centre at Bream Bay.