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Seaweeds > Division Rhodophyta
Lacy red seaweed
Martensia elegans*
Family Delesseriaceae
updated Jan 13

Where seen? This odd seaweed is sometimes seen on some of our Southern shores, in small clumps of a few blades, attached to coral rubble near reefs.

Features: Cluster of a few circular fan-shaped blades about 5-8cm across, smooth and solid, unperforated at the base, a lacy net-like mesh at the outer edges which are often ruffled. Sometimes, with little balls attached to the lacy surface. Young blades mostly solid and not lacy. Colours beige or bright green with tinges of lilac or blue.

Pulau Hantu, Apr 06

Little balls attached to the lacy surface.


Pulau Jong, Jul 07

Pulau Jong, Jul 07

Pulau Jong, Jul 07

Base of the blade smooth, unperforated.

*Seaweed species are difficult to positively identify without microscopic examination.
On this website, they are grouped by external features for convenience of display.

Lacy red seaweeds on Singapore shores

Photos of Lacy red seaweeds for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map


Raffles Lighthouse, Jun 07

Pulau Pawai, Dec 09

Pulau Salu, Jun 10


Terumbu Berkas, Jan 10

Terumbu Berkas, Jan 10

Pulau Berkas, May 10

Martensia 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.

  Martensia elegans

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].
  • 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.
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