Story: Water quality

Lagarosiphon (1st of 3)


A serious concern in South Island lakes, and widespread in the North Island, Lagarosiphon major is an aggressive water weed. The stems grow up to 5 metres long. Stem fragments are the main means by which the weed spreads. The small fish is about 5 centimetres long.

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NIWA – National Institute of Water and Atmospheric Research
Photograph by John Clayton

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How to cite this page:

Mike Scarsbrook and Kit Rutherford, 'Water quality - Problem plants and microbes', Te Ara - the Encyclopedia of New Zealand, (accessed 25 May 2022)

Story by Mike Scarsbrook and Kit Rutherford, published 24 Nov 2008, updated 18 Jul 2016