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Seaweeds > Division Chlorophyta
Green sea sausage seaweed
Bornetella oligospora*
Family Dasycladaceae
updated Oct 2016

Where seen? This shiny bulbous seaweed is sometimes seen on our Southern shores, growing on coral rubble in small, scattered clusters.

Features: Cluster of club- to cylindrical shapes (2-3cm long). The ends are blunt, rounded. Sometimes, there are tufts of white filaments at the tips. Shiny, opaque and bright green, sometimes with a brownish or reddish tinge. This seaweed is moderately calcified. The seaweed is actually made up of tiny branches packed tightly around a central stalk to form the cylindrical shape, somewhat like the bristles on a bottlebrush.

According to AlgaeBase, there are 7 current Bornetella species.

Sometimes confused with 'Taugeh' seaweeds (Neomeris sp.) which have white bases to their 'stems' and is more cylindrical (rather than club-shaped). May also be confused with Bubble green seaweed (Borgensenia sp.) which is bubble shaped and translucent. Here's more on how to tell apart some green seaweeds.

Bornetella sphaerica forms clusters of oval to round shapes, 1cm or less and found in clusters. Bornetella oligospora and Bornetella nitida form clusters of club shapes (to 5cm tall) that are slightly curved, sometimes with reddish tips. The two species are only positively distinguished by microscopic examination of reproductive features.

Terumbu Raya, May 10

Tufts of white filaments at the tips.

Terumbu Semakau, Jun 10

With thinner white-stemmed seaweed.
Kusu Island , May 04

*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.

Green sea sausage green seaweed on Singapore shores

Photos of Green sea sausage green seaweed for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map

Lazarus Island, Mar 16
Photo shared by Jonathan Tan on facebook.

Raffles Lighthouse, Jul 06

Pulau Biola, May 10

Pulau Senang, Jun 10

Pulau Biola, Dec 09

Bornetella 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.

  Bornetella oligospora
Bornetella sphaerica

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.
  • 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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