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Seaweeds > Division Chlorophyta > Family Caulerpaceae > genus Caulerpa
Zipper green seaweed
Caulerpa cupressoides*
Family Caulerpaceae

updated Aug 08

Where seen? This toothy green seaweed is commonly seen on some of our shores, usually in a small clump on coral rubble.

Features: Zipper-like structure 4-6cm long. The central 'stem' is flat and relatively broad. The side 'branches' are very short, flat and have pointed tips. Thus it looks somewhat like a zipper! May be long and slender, or short and very broad. The central stem may branch at the tips to form Y-shapes.

These structures emerge along the length of a 'stem' that creeps over hard surfaces or just under the sand. Dark to olive green, sometimes bluish green.

Sometimes confused with similar green seaweeds. Here's more on how to tell apart some green seaweeds.

Human uses: Zipper seaweed is reported to be edible, to have antibacterial and antifungal properties, and used to treat high blood pressure. However, some Caulerpa species produce toxins to protect themselves from browsing fish. This also makes them toxic to humans.

Its scientific name 'cupressoides' means 'cypress-like' or 'resembling cypress'.

Pulau Sekudu, Jun 05

Zipper green seaweeds on Singapore shores


Chek Jawa, Aug 05

Pulau Sekudu, Sep 07

Sentosa, Jun 04

more photos of zipper green seaweeds on Singapore shores

*Species are difficult to positively identify without close examination of internal parts.
On this website, they are grouped by external features for convenience of display.

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