This feathery green seaweed is sometimes seen in small patches on our Southern shores. It was also called Caulerpa crassifolia.
Features: A feather-like structure about 2cm long. The mid-rib or central 'stem' of the feathery structure
is flat and usually with a width wider or the same as the length of
the side 'branches'. The side 'branches' are short, flat and have
rounded to bluntly pointed tips. These little feathery structures
emerge along the length of a 'stem' that creeps over hard surfaces
or just under the sand.
Colours generally bright green.
name is mexicana because the seaweed was originally described from
specimens from Mexico.
Sometimes confused with other
feathery green seaweeds or with seagrasses.
Here's more on how to tell apart different
feathery green seaweeds and how to tell apart feathery
green seaweeds and seagrasses.
In small clumps on rocky areas.
St John's Island, Sep 04
Mid-rib width wider or the same
as the length of side 'branches'.
Chek Jawa, Aug 07
Terumbu Berkas, Jan 10
Side branches with rounded or
bluntly pointed tips.
Terumbu Pempang Laut, Aug 10
*Species are difficult
to positively identify without close examination of internal parts.
On this website, they are grouped by external features for convenience of
green seaweeds on Singapore shores
Pulau Senang, Aug 10
- Lee Ai Chin, Iris U. Baula, Lilibeth N. Miranda and Sin Tsai Min ; editors: Sin Tsai Min and Wang Luan Keng, A photographic guide to the marine algae of Singapore, Tropical Marine Science Institute, 201 pp.
- Pham, M.
N., H. T. W. Tan, S. Mitrovic & H. H. T. Yeo, 2011. A
Checklist of the Algae of Singapore, 2nd Edition. Lee Kong Chian Natural History Museum, National University of Singapore,
Singapore. 99 pp. Uploaded 1 October 2011. [PDF, 1.58 MB].
- Eric Coppejans
and Tom Beeckman. 1990. Caulerpa
(Chlorophyta, Caulerpales) from the Kenyan coast (pdf).
Laboratorium voor Morfologie, Systematiek en Ecologie van de Planten
R.U.G. Ledeganckstraat 35, 9000 Gent, Belgium on the Phycology
Research website: identification key and useful diagrams on
how to tell apart similar Caulerpa species.
John M. 2000. Marine
Plants of Australia University of Western Australia Press. 300pp.