fan green seaweed
This fan-shaped seaweed is sometimes seen at Tuas, growing
on and among coral rubble. Elsewhere also in sand.
Features: A long fan- or spatula-shaped
blade (2-4cm long) with ruffled edges, in clusters of several blades.
Sometimes really long ones (about 10cm) are seen growing in clumps
of a few large blades. The blade is made up of a tangle of tiny filaments
that give it a velvety texture and is slightly to moderately calcified.
The stem that holds up the blade (stipe) is calcified. Usually
olive green, but may be bright to dark green.
According to AlgaeBase,
there are 40 current Udotea species.
Sometimes confused with other fan-shaped green seaweeds.
Here's more on how to tell apart fan-shaped green
Human uses: Some species have
anti-bacterial and anti-tumor properties.
Tuas, Oct 10
Tuas, Apr 05
Tuas, Sep 08
Tuas, Apr 08
fan 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
species recorded for Singapore
Pham, M. N.,
H. T. W. Tan, S. Mitrovic & H. H. T. Yeo, 2011. A Checklist of
the Algae of Singapore.
- 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, 2015. 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].
John M. 2000. Marine
Plants of Australia University of Western Australia Press. 300pp.
H. P. & Menez, E. G., 1997.Field
Guide to the Common Mangroves, Seagrasses and Algae of the Philippines.
Bookmark, Inc., the Philippines. 197 pp.
- Trono, Gavino.
C. Jr., 1997. Field
Guide and Atlas of the Seaweed Resources of the Philippines..
Bookmark, Inc., the Philippines. 306 pp.