Marine Pest of the Week

Pest of the Week - Red seaweed
Environmental & Sustainability News

Red Seaweed (Asparagopsis taxiformis)

Why is it a problem? Very similar to a New Zealand native, Asparagopsis armata ...
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February 2026

Northern Pacific Sea Star (Asterias amurensis)

Why is it a problem? The Northern Pacific sea star is a voracious predator that...
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Environmental & Sustainability News

Marine Pest of the Week: The European Shore Crab (Carcinus maenas)

Why is it a problem? In some areas where it has been introduced, the European s...
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Environmental & Sustainability News

Marine Pest of the Week: Asian Shore Crab

Why is it a problem? The Ministry for Primary industries says that this crab ea...
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Environmental & Sustainability News

Marine Pest of the Week: Asian Clam (Potamocorbula amurensis)

Why is it a problem? The Asian clam can occur in very high densities; over 25,0...
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Environmental & Sustainability News

Marine Pest of the Week: Asian Brown Mussel

Why is it a problem? The Ministry for Primary Industries says that the green-li...
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Environmental & Sustainability News

Marine Pest of the Week: Aquarium Caulerpa (Caulerpa taxifolia)

Why is it a problem? The aquarium type is cold-tolerant, fast growing and, in n...
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Native seagrass is a beneficial species that can be difficult to tell apart from the invasive seaweed exotic caulerpa. // Photo credit: Shaun Lee
Boat Brief

Marine pest or native look-alike?

Know the difference and help protect our best boating spots.  With an army of...
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January 2026

Marine Pest of the Week – Asian Paddle Crab (Charybdis japonica)

The Asian Paddle Crab is in some parts of New Zealand we don't want it to spread...
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