STOP exotic caulerpa seaweed

Exotic caulerpa is a fast-growing seaweed threatening our native marine ecosystem. Boaties, fishers, and divers can help by:

  • Check for seaweed on your anchor, chain and gear
  • Remove any seaweed found and bag it securely
  • Dispose of it onshore in your rubbish or compost
  • If unsafe, return it to the water where it was found.

What exotic caulerpa looks like

Caulerpa up close on the beach photo credit Sid Wales MPI.

A close-up of caulerpa on a beach (Photo: Sid Wales, MPI).

Diver underwater photographing caulerpa on the seabed (Photo credit NIWA).

Caulerpa on the seabed (Photo credit NIWA).

Visit for the latest updates, including affected areas, controls, maps, and photos.

Think you've seen caulerpa? Take a photo, record your location, call 0800 80966 or visit