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Solitary
fan green seaweed
Avrainvillea erecta*
Family Udoteaceae
updated
Oct 2019
Where
seen? These solitary stalked green fans are sometimes seen on some of our
shores, sticking out of the ground here and there. Usually in coral
rubble areas.
Features: A paddle-shaped blade
(4-5cm wide), usually growing alone, sometime a few near one another.
The blade is flat and not ruffled, and may be divided into four or
more 'wings'. The flexible blade is made up of a tangle of tiny filaments
that give it a velvety texture. The blade is held up on a stiff stalk
that may be buried in sand or wedged into crevices. The stalk can be quite long (up to 10cm long), with only a short portion
sticking out above the surface. Sometimes, the single blade is divided
into three or four 'wings'. Usually dark green sometimes with pale
or yellowish edges.
Sometimes, tiny Strawberry
slugs (Costasiella sp.) are found on this seaweed.
Sometimes confused with other
fan-shaped green seaweeds. Here's more on how
to tell apart fan-shaped green seaweeds. |
Tuas, Jun 05 |
Kusu Island, Jun 05 |
Chek Jawa, May 05 |
Sometimes
divided into four or more 'wings'.
Pulau Sekudu, Jan 06
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*Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of
display.
Solitary
fan green seaweeds on Singapore shores |
Other sightings on Singapore shores |
Beting Bemban Besar, Aug 18
Photo shared by Liz Lim on facebook. |
Terumbu Pempang Tengah, Jun 20
Photo shared by Vincent Choo on facebook. |
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Pulau Pawai, Dec 09 |
Pulau Sudong, Dec 09 |
Pulau Berkas, May 10 |
Links
References
- 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].
- Lim, S.,
P. Ng, L. Tan, & W. Y. Chin, 1994. Rhythm of the Sea: The
Life and Times of Labrador Beach. Division of Biology, School
of Science, Nanyang Technological University & Department
of Zoology, the National University of Singapore. 160 pp.
- Calumpong,
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.
- Hillson,
C. J. 1982. Seaweeds:
A Color-Coded, Illustrated Guide to Common Marine Plants of the
East Coast of the United States Keystone Books. 194pp.
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