Also known as:
Origin: Africa, Asia, Australia, North and South America, Oceania
Regional Pest Management Plan (RPMP) status
- Not a legally declared pest
Seaweed < 2.8 m tall. Stolons are creeping and bear flattened, feather-like fronds with many pinnules. Pinnules are opposite, curve upwards and narrow at the tip.
What you need to know
Although caulerpa is not a legally declared pest plant, it may still be invasive in some situations. Consider lower-risk alternatives for your garden, such as native plants.
Nutrient-rich waters, pristine waters, port and mooring facilities, tropical and temperate waters at a depth of < 100 m.
Vegetative spread from stolons and stolon fragments, dispersed by water. Human-mediated dispersal through dumping of aquarium waste and movement of contaminated boats and fishing equipment.
Impact on environment
Outcompetes and smothers seagrasses and other algae, altering habitat and native species diversity. Toxic and possibly allelopathic.
Very difficult to control once established. Requires an aquatic pest plant control operator. Contact Auckland Council for control options.
Method: Pull out.
Plant parts requiring disposal: All parts.
Disposal options: Remove to landfill.
Biocontrol is currently not available for this species.
Caution: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.