green seaweeds text index | photo index
Seaweeds > Division Chlorophyta
Pleated fan green seaweed
Rhipidosiphon javensis*
Family Udoteaceae
updated Jan 13

Where seen? This smooth fan-shaped seaweed in clusters is sometimes seen on some of our Northern shores, growing on and among coral rubble. Elsewhere also in sand. It was previously known as Udotea javensis.

Features: A long fan- or spatula-shaped blade (2-3cm long) that are thin and floppy without ruffled edges although the thin blades may be folded in pleats, in clusters of several 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 bright green.

Sometimes confused with
other fan-shaped green seaweeds. Here's more on how to tell apart fan-shaped green seaweeds.

Human uses: Some species have anti-bacterial and anti-tumor properties.

Beting Bronok, Jul 08

Beting Bronok, Aug 05

Labrador, Jul 05

Chek Jawa, May 05

*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.

Pleated fan green seaweeds on Singapore shores

Photos for Pleated fan green seaweeds for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map

Rhipidosiphon 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.

  Rhipidosiphon javensis



  • 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.
  • Huisman, John M. 2000. Marine Plants of Australia University of Western Australia Press. 300pp.
  • 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.
FREE photos of
green seaweeds.
Make your own badge here.
links | references | about | email Ria
Spot errors? Have a question? Want to share your sightings? email Ria I'll be glad to hear from you!
wildfactsheets website©ria tan 2008