NZ Herald
  • Home
  • Latest news
  • Herald NOW
  • Video
  • New Zealand
  • Sport
  • World
  • Business
  • Entertainment
  • Podcasts
  • Quizzes
  • Opinion
  • Lifestyle
  • Travel
  • Viva
  • Weather

Subscriptions

  • Herald Premium
  • Viva Premium
  • The Listener
  • BusinessDesk

Sections

  • Latest news
  • New Zealand
    • All New Zealand
    • Crime
    • Politics
    • Education
    • Open Justice
    • Scam Update
  • Herald NOW
  • On The Up
  • World
    • All World
    • Australia
    • Asia
    • UK
    • United States
    • Middle East
    • Europe
    • Pacific
  • Business
    • All Business
    • MarketsSharesCurrencyCommoditiesStock TakesCrypto
    • Markets with Madison
    • Media Insider
    • Business analysis
    • Personal financeKiwiSaverInterest ratesTaxInvestment
    • EconomyInflationGDPOfficial cash rateEmployment
    • Small business
    • Business reportsMood of the BoardroomProject AucklandSustainable business and financeCapital markets reportAgribusiness reportInfrastructure reportDynamic business
    • Deloitte Top 200 Awards
    • CompaniesAged CareAgribusinessAirlinesBanking and financeConstructionEnergyFreight and logisticsHealthcareManufacturingMedia and MarketingRetailTelecommunicationsTourism
  • Opinion
    • All Opinion
    • Analysis
    • Editorials
    • Business analysis
    • Premium opinion
    • Letters to the editor
  • Politics
  • Sport
    • All Sport
    • OlympicsParalympics
    • RugbySuper RugbyNPCAll BlacksBlack FernsRugby sevensSchool rugby
    • CricketBlack CapsWhite Ferns
    • Racing
    • NetballSilver Ferns
    • LeagueWarriorsNRL
    • FootballWellington PhoenixAuckland FCAll WhitesFootball FernsEnglish Premier League
    • GolfNZ Open
    • MotorsportFormula 1
    • Boxing
    • UFC
    • BasketballNBABreakersTall BlacksTall Ferns
    • Tennis
    • Cycling
    • Athletics
    • SailingAmerica's CupSailGP
    • Rowing
  • Lifestyle
    • All Lifestyle
    • Viva - Food, fashion & beauty
    • Society Insider
    • Royals
    • Sex & relationships
    • Food & drinkRecipesRecipe collectionsRestaurant reviewsRestaurant bookings
    • Health & wellbeing
    • Fashion & beauty
    • Pets & animals
    • The Selection - Shop the trendsShop fashionShop beautyShop entertainmentShop giftsShop home & living
    • Milford's Investing Place
  • Entertainment
    • All Entertainment
    • TV
    • MoviesMovie reviews
    • MusicMusic reviews
    • BooksBook reviews
    • Culture
    • ReviewsBook reviewsMovie reviewsMusic reviewsRestaurant reviews
  • Travel
    • All Travel
    • News
    • New ZealandNorthlandAucklandWellingtonCanterburyOtago / QueenstownNelson-TasmanBest NZ beaches
    • International travelAustraliaPacific IslandsEuropeUKUSAAfricaAsia
    • Rail holidays
    • Cruise holidays
    • Ski holidays
    • Luxury travel
    • Adventure travel
  • Kāhu Māori news
  • Environment
    • All Environment
    • Our Green Future
  • Talanoa Pacific news
  • Property
    • All Property
    • Property Insider
    • Interest rates tracker
    • Residential property listings
    • Commercial property listings
  • Health
  • Technology
    • All Technology
    • AI
    • Social media
  • Rural
    • All Rural
    • Dairy farming
    • Sheep & beef farming
    • Horticulture
    • Animal health
    • Rural business
    • Rural life
    • Rural technology
    • Opinion
    • Audio & podcasts
  • Weather forecasts
    • All Weather forecasts
    • Kaitaia
    • Whangārei
    • Dargaville
    • Auckland
    • Thames
    • Tauranga
    • Hamilton
    • Whakatāne
    • Rotorua
    • Tokoroa
    • Te Kuiti
    • Taumaranui
    • Taupō
    • Gisborne
    • New Plymouth
    • Napier
    • Hastings
    • Dannevirke
    • Whanganui
    • Palmerston North
    • Levin
    • Paraparaumu
    • Masterton
    • Wellington
    • Motueka
    • Nelson
    • Blenheim
    • Westport
    • Reefton
    • Kaikōura
    • Greymouth
    • Hokitika
    • Christchurch
    • Ashburton
    • Timaru
    • Wānaka
    • Oamaru
    • Queenstown
    • Dunedin
    • Gore
    • Invercargill
  • Meet the journalists
  • Promotions & competitions
  • OneRoof property listings
  • Driven car news

Puzzles & Quizzes

  • Puzzles
    • All Puzzles
    • Sudoku
    • Code Cracker
    • Crosswords
    • Cryptic crossword
    • Wordsearch
  • Quizzes
    • All Quizzes
    • Morning quiz
    • Afternoon quiz
    • Sports quiz

Regions

  • Northland
    • All Northland
    • Far North
    • Kaitaia
    • Kerikeri
    • Kaikohe
    • Bay of Islands
    • Whangarei
    • Dargaville
    • Kaipara
    • Mangawhai
  • Auckland
  • Waikato
    • All Waikato
    • Hamilton
    • Coromandel & Hauraki
    • Matamata & Piako
    • Cambridge
    • Te Awamutu
    • Tokoroa & South Waikato
    • Taupō & Tūrangi
  • Bay of Plenty
    • All Bay of Plenty
    • Katikati
    • Tauranga
    • Mount Maunganui
    • Pāpāmoa
    • Te Puke
    • Whakatāne
  • Rotorua
  • Hawke's Bay
    • All Hawke's Bay
    • Napier
    • Hastings
    • Havelock North
    • Central Hawke's Bay
    • Wairoa
  • Taranaki
    • All Taranaki
    • Stratford
    • New Plymouth
    • Hāwera
  • Manawatū - Whanganui
    • All Manawatū - Whanganui
    • Whanganui
    • Palmerston North
    • Manawatū
    • Tararua
    • Horowhenua
  • Wellington
    • All Wellington
    • Kapiti
    • Wairarapa
    • Upper Hutt
    • Lower Hutt
  • Nelson & Tasman
    • All Nelson & Tasman
    • Motueka
    • Nelson
    • Tasman
  • Marlborough
  • West Coast
  • Canterbury
    • All Canterbury
    • Kaikōura
    • Christchurch
    • Ashburton
    • Timaru
  • Otago
    • All Otago
    • Oamaru
    • Dunedin
    • Balclutha
    • Alexandra
    • Queenstown
    • Wanaka
  • Southland
    • All Southland
    • Invercargill
    • Gore
    • Stewart Island
  • Gisborne

Media

  • Video
    • All Video
    • NZ news video
    • Herald NOW
    • Business news video
    • Politics news video
    • Sport video
    • World news video
    • Lifestyle video
    • Entertainment video
    • Travel video
    • Markets with Madison
    • Kea Kids news
  • Podcasts
    • All Podcasts
    • The Front Page
    • On the Tiles
    • Ask me Anything
    • The Little Things
  • Cartoons
  • Photo galleries
  • Today's Paper - E-editions
  • Photo sales
  • Classifieds

NZME Network

  • Advertise with NZME
  • OneRoof
  • Driven Car Guide
  • BusinessDesk
  • Newstalk ZB
  • Sunlive
  • ZM
  • The Hits
  • Coast
  • Radio Hauraki
  • The Alternative Commentary Collective
  • Gold
  • Flava
  • iHeart Radio
  • Hokonui
  • Radio Wanaka
  • iHeartCountry New Zealand
  • Restaurant Hub
  • NZME Events

SubscribeSign In
Advertisement
Advertise with NZME.
Home / New Zealand

Does NZ's 'marine heatwave' mean more shark encounters?

Jamie Morton
By Jamie Morton
Multimedia Journalist·NZ Herald·
11 Jan, 2022 04:00 PM4 mins to read

Subscribe to listen

Access to Herald Premium articles require a Premium subscription. Subscribe now to listen.
Already a subscriber?  Sign in here

Listening to articles is free for open-access content—explore other articles or learn more about text-to-speech.
‌
Save

    Share this article

A look at fatal encounters with sharks that have happened in New Zealand, and some expert advice from Surf Lifesaving NZ.

It's made for balmy beach conditions, sent kingfish and rays into southern waters, and even brought forward the grape-growing season in some places.

But a Department of Conservation scientist says there's nothing to suggest a massive "marine heatwave" that's enveloped the country is behind a string of summer shark encounters.

On Sunday, teenager Alvira Repia-King was left with 52 stitches after being bitten by a seven-gill shark at Oamaru's Friendly Bay, while on Christmas Day, a small shark latched onto the toe of 9-year-old Cordelia Scott as she was swimming at Punakaiki on the South Island's West Coast.

Great white sharks have nudged fishing boats in two separate instances and last week, surfcaster Joel Gray got an unexpected shock when he landed a 2.5m juvenile at Matatā Beach.

DoC's Clinton Duffy has also fielded fresh sightings of a whale shark near the Poor Knights Islands, and a "very large" hammerhead near the Mokohinau Islands.

Advertisement
Advertise with NZME.
Advertisement
Advertise with NZME.

Yet, despite the northern North Island experiencing record-warm sea conditions, the marine scientist told the Herald this summer's shark count had so far been "fairly typical".

"I wouldn't say this has been a stand-out year for sharks," Duffy said.

"The species that typically show the biggest shifts during environmental events tend to be offshore, oceanic ones whose prey distribution are affected by things like currents, hydrology and nutrients."

Advertisement
Advertise with NZME.

Coastal shark species, meanwhile, relied on specific habitats, so returned to the same spots year after year.

"What we do see more of unusually warm years are migrants like sub-tropical sharks and rays – but so far, there hasn't been a lot of sightings of these."

While around 66 shark species have been identified living in our surrounding seas, there are only around a dozen that fishers and swimmers will regularly come across.

Despite their fearful appearance, only a handful, like the great white, mako and hammerhead, pose a threat to human life.

Many species congregate in the warm waters of the upper North Island, ranging from bronze whalers, blue sharks, makos, giant manta rays and school sharks.

Around the South Island, generally harmless species such as spiny dogfish, school and blue sharks make the marine habitat their home.

But by far one of the most dangerous stretches of coastlines in the country is in the deep south, where mature great whites, with their distinct white underbelly, make their residence.

Considered the deadliest and most dangerous shark, the great white is found around both islands, with the young preferring warmer northern waters. Adults can be found in southern waters near seal colonies.

There's also been a growing number of great white sightings in the Bowentown area of the Tauranga Harbour and also along the coastline, prompting a recent warning from DoC.

Run-ins with large sharks in coastal waters usually happen over spring and summer, when many species move inshore to pup and feed.

Advertisement
Advertise with NZME.

At the same time, Duffy said scientists had to take into account that warmer water could simply be drawing more people to the sea, which in turn brought more sightings.

"Undoubtedly, that plays a role in the number of sightings we get, and makes for a challenge when it comes to analysing data."

He said the marine heatwave seemed to have a more apparent effect on fish species – particularly with kingfish and short-tail stingrays and eagle rays being spotted in southern areas that'd usually be too cold for them.

New Zealand sea surface temperatures, as at January 8. Marine heatwave conditions remain around the northern North Island. Image / Supplied
New Zealand sea surface temperatures, as at January 8. Marine heatwave conditions remain around the northern North Island. Image / Supplied

The last time New Zealand experienced a comparable event, over the record-hot summer of 2017-18, Dunedin residents noticed a sudden jump in stingray numbers around Otago Harbour.

Niwa fisheries scientist Darren Parsons said it wasn't only fish species common in New Zealand that would be on the move right now.

"Tropical species like warm waters, so they'll be travelling further south," he said.

Advertisement
Advertise with NZME.

"Expect more species such as marlin, mahi-mahi and little tropical vagrant species to turn up in Poor Knights Islands."

Heatwaves aside, Duffy said the message to shark-wary Kiwis heading into the surf remained the same as every year.

"People need to be aware that the marine environment isn't their backyard," he said.

"If you go down to the sea it's reasonable to expect a shark is nearby, because at this time of year, several species do come in near the shore."

Save

    Share this article

Latest from New Zealand

New Zealand

Man charged in fatal South Auckland crash, further charges possible

01 Jul 08:10 AM
Politics

'Until we meet again': Hundreds gather in Taihape to mourn 'peaceful leader'

01 Jul 08:00 AM
New Zealand|crime

'I am scared of drug money': Money launderer's staff complained cash was wet, sticky

01 Jul 08:00 AM

There’s more to Hawai‘i than beaches and buffets – here’s how to see it differently

sponsored
Advertisement
Advertise with NZME.

Latest from New Zealand

Man charged in fatal South Auckland crash, further charges possible

Man charged in fatal South Auckland crash, further charges possible

01 Jul 08:10 AM

A 56-year-old man faces charges including dangerous driving causing death.

'Until we meet again': Hundreds gather in Taihape to mourn 'peaceful leader'

'Until we meet again': Hundreds gather in Taihape to mourn 'peaceful leader'

01 Jul 08:00 AM
'I am scared of drug money': Money launderer's staff complained cash was wet, sticky

'I am scared of drug money': Money launderer's staff complained cash was wet, sticky

01 Jul 08:00 AM
Atmospheric river to swamp parts of northern NZ, flood-hit South Island braces for fresh deluge

Atmospheric river to swamp parts of northern NZ, flood-hit South Island braces for fresh deluge

01 Jul 07:43 AM
From early mornings to easy living
sponsored

From early mornings to easy living

NZ Herald
  • About NZ Herald
  • Meet the journalists
  • Newsletters
  • Classifieds
  • Help & support
  • Contact us
  • House rules
  • Privacy Policy
  • Terms of use
  • Competition terms & conditions
  • Our use of AI
Subscriber Services
  • NZ Herald e-editions
  • Daily puzzles & quizzes
  • Manage your digital subscription
  • Manage your print subscription
  • Subscribe to the NZ Herald newspaper
  • Subscribe to Herald Premium
  • Gift a subscription
  • Subscriber FAQs
  • Subscription terms & conditions
  • Promotions and subscriber benefits
NZME Network
  • The New Zealand Herald
  • The Northland Age
  • The Northern Advocate
  • Waikato Herald
  • Bay of Plenty Times
  • Rotorua Daily Post
  • Hawke's Bay Today
  • Whanganui Chronicle
  • Viva
  • NZ Listener
  • Newstalk ZB
  • BusinessDesk
  • OneRoof
  • Driven Car Guide
  • iHeart Radio
  • Restaurant Hub
NZME
  • About NZME
  • NZME careers
  • Advertise with NZME
  • Digital self-service advertising
  • Book your classified ad
  • Photo sales
  • NZME Events
  • © Copyright 2025 NZME Publishing Limited
TOP