green seaweeds text index | photo index
Seaweeds > Division Chlorophyta > Family Caulerpaceae > genus Caulerpa
Serrated green seaweed
Caulerpa serrulata*
Family Caulerpaceae
updated Aug 10
Where seen? This coiled, serrated seaweed is sometimes seen on some of our shores, growing in small clumps on coral rubble.

Features: 4-6cm long, but often tightly coiled and thus shorter. The central 'stem' is strap-like, flat but thick. The 'stem' has serrated edges of blunt spikes. In some, the 'stem' is tightly coiled. These spiky strap-like structures emerge along the length of a horizontal 'stem' that creeps over hard surfaces or just under the sand. Usually bluish- or greyish-green.

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

Human uses: This seaweed is reported to be edible and used in medicines as an antibacterial and antifungal agent as well as to lower blood pressure.

Sentosa, Jun 04

Tuas, Sep 08

Labrador, Mar 05

Serrated green seaweed on Singapore shores

Labrador, May 09

Labrador, May 09


Sentosa, Jun 05

Pulau Jong, Jul 06

Raffles Lighthouse, Aug 06

more photos of serrated green seaweeds on Singapore shores
part 1 | part 2 | part 3

*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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