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Seaweeds > Division Rhodophyta > Family Gracilariacea > Gracilaria species
Halymenia red seaweed
Halymenia sp.*
Family Halymeniaceae
updated Oct 2016

Where seen? Sometimes mistaken for red plastic bags, these traslucent slippery red seaweeds are often seen, especially on our Southern shores. Each clump can be quite large.

Features: Texture slippery. Some are flat with feathered edges. Others have branching forms with a broad flat central 'stem' from which arise finer branches. Spots and bumps on the seaweed may be reproductive structures. Ruffled halymenia red seaweed (Halymenia dilatata) is translucent, slippery flat with ruffled edges. Frilly sheet red seaweed (Halymenia maculata) is more leathery.

Although each clump of Halymenia red seaweed can be large, these seaweeds do not 'bloom' and cover large areas like some other kinds of seaweeds.

According to AlgaeBase: there are 65 current Halymenia species.

Human uses: Among the Halymenia species that are eaten by people are H. discoidea and H. durvillaei. H. venusta is used as animal feed.

Labrador, Mar 05

Pulau Semakau, Apr 08

Labrador, Mar 05

Pulau Semakau, May 08

 

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

Halymenia red seaweeds on Singapore shores

Photos of Halymenia red seaweeds for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map


Pulau Biola, Dec 09

Pulau Biola, Dec 09

Pulau Salu, Jun 10


Pulau Pawai, Dec 09

Pulau Pawai, Dec 09

Pulau Biola, Dec 09


Terumbu Berkas, Jan 10

Terumbu Berkas, Jan 10

Pulau Berkas, May 10


Terumbu Salu, Jan 10
   

Halymenia 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.

  Halymenia dilatata (Flat halymenia red seaweed)
Halymenia durvillei
Halymenia floresii
Halymenia formosa
Halymenia maculata
(Frilly sheet red seaweed)
Halymenia microcarpa

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.
  • 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.
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