Northland Age
  • Northland Age home
  • Latest news
  • Sport
  • Rural
  • Opinion
  • Kaitaia weather

Subscriptions

  • Herald Premium
  • Viva Premium
  • The Listener
  • BusinessDesk

Sections

  • Latest news
  • Sport
  • Rural
    • All Rural
    • Dairy farming
    • Sheep & beef farming
    • Horticulture
    • Animal health
    • Rural business
    • Rural life
    • Rural technology

Locations

  • Far North
  • Kaitaia
  • Kaikohe
  • Bay of Islands
  • Whangārei

Weather

  • Kaitaia
  • Whangārei
  • Dargaville

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 / Northland Age

Unusual seaweed found in Bay of Islands not an invasive nasty

Northland Age
6 Mar, 2018 02:30 AM3 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

The strange seaweed found in the Bay of Islands has been confirmed as non-invasive Chaetomorpha linum, not mermaid's hair, as was initially feared.

The strange seaweed found in the Bay of Islands has been confirmed as non-invasive Chaetomorpha linum, not mermaid's hair, as was initially feared.

Molecular analysis has confirmed that an unusual seaweed that wrapped itself around an anchor in the Bay of Islands late last year was not the potentially invasive species known as mermaid's hair.

That was good news for Northland Regional Council biosecurity experts, but biosecurity manager — marine and strategy Sophia Clark said while the weed turned out to be the non-invasive Chaetomorpha linum, authorities were thrilled that it had been reported.

"It's still an unusual-looking seaweed, and we're really pleased the incident reporter took the time to let both us and the Ministry for Primary Industries know," she said.

The council had noticed an increase in members of the public reporting things they believed were unusual or could be a known marine pest over recent months, the seaweed coming up with an anchor off Roberton Island.

Ms Clark said making a formal, positive identification of some marine pest species could be a reasonably lengthy, time-consuming and difficult process. In this case the seaweed's DNA had to be compared to other samples, one of which had to be sent from Australia. The effort was always worthwhile though.

Advertisement
Advertise with NZME.
Advertisement
Advertise with NZME.

"Marine pests have the potential to cause a great deal of environmental, economic and other harm across multiple fronts, so any reports that draw them to our attention are extremely helpful, even if it ends up being a false alarm," she said.

Meanwhile, as part of the NRC's efforts to monitor and prevent the spread of pests into new areas, council divers had inspected more than 1250 boat hulls in Northland over summer. As of last week those inspections had not revealed any new established marine pest populations outside the areas where they were already known, but with given Northland's more than 3200km of coastline and "vast" marine space it was impossible for the council to be everywhere at once, "and it's great to have eyes and ears out on the water via the public".

While mermaid's hair wasn't the worst marine invader that potentially threatened Northland, its presence would still be an issue, as it was a biofouling organism, she added. It could attach itself to boats and marine structures and build up relatively quickly in both mass and area, effectively pushing out native species like the green-lipped mussel.

Advertisement
Advertise with NZME.

Unwanted seaweeds were just some of many potential marine invaders, however. Information on them, and land-based pests, could be found at www.nrc.govt.nz/pestcontrolhub.

"It's really important to make sure you keep your hull and other boating equipment clean, and if you do pull up biomass on your anchor, make sure you don't transport it to your next destination," she said. "Remember, if it looks unusual, keep the sample on board and call the regional council on (0800) 002 004 or the Ministry for Primary Industries' 24/7 exotic pests and disease hotline, (0800) 809 966."

Save

    Share this article

Latest from Northland Age

Northland Age

'Grateful no one was killed': Man clambers on campervan to rescue pensioner hurt in twister

Northland Age

Far North news in brief: Global orca study, rural crime prevention workshops

Northland Age

'We need cops': Kaikohe's plea amid rising crime rates


Sponsored

Solar bat monitors uncover secrets of Auckland’s night sky

Advertisement
Advertise with NZME.

Latest from Northland Age

'Grateful no one was killed': Man clambers on campervan to rescue pensioner hurt in twister
Northland Age

'Grateful no one was killed': Man clambers on campervan to rescue pensioner hurt in twister

A tornado flipped a campervan, injuring an elderly man inside.

15 Jul 03:26 AM
Far North news in brief: Global orca study, rural crime prevention workshops
Northland Age

Far North news in brief: Global orca study, rural crime prevention workshops

14 Jul 06:58 PM
'We need cops': Kaikohe's plea amid rising crime rates
Northland Age

'We need cops': Kaikohe's plea amid rising crime rates

14 Jul 05:41 PM


Solar bat monitors uncover secrets of Auckland’s night sky
Sponsored

Solar bat monitors uncover secrets of Auckland’s night sky

06 Jul 09:47 PM
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
  • The Northland Age e-edition
  • Manage your print subscription
  • Manage your digital subscription
  • Subscribe to Herald Premium
  • Subscribe to The Northland Age
  • Gift a subscription
  • Subscriber FAQs
  • Subscription terms & conditions
  • Promotions and subscriber benefits
NZME Network
  • The Northland Age
  • The New Zealand Herald
  • 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
  • Photo sales
  • NZME Events
  • © Copyright 2025 NZME Publishing Limited
TOP