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Story: Marine invaders

Checking ballast water

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Checking ballast water

To reduce the risk of unwanted organisms entering New Zealand waters, regulations require ships to exchange their high-risk ballast water away from coasts. This man is taking samples of water in a ship’s hold to check that the vessel has complied with the requirements.

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Cawthron Institute

by Tim Dodgshun

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How to cite this page

Christina Troup, Marine invaders – Preventing future invasions, Te Ara – the Encyclopedia of New Zealand, https://teara.govt.nz/en/photograph/8681/checking-ballast-water (accessed 4 June 2026).

Story by Christina Troup, published 2 March 2009.