seen? This odd triangular seaweed is sometimes seen on
our undisturbed Southern shores, growing on large boulders facing
strong waves and currents, usually near the low water mark.
Features: Blades pyramidal or
conical, solid, stiff; arranged around a vertical 'stem'. On rocks
facing strong waves, these grow as short upright columns (6-8cm).
In sheltered lagoons, those with very long 'stems' (20-30cm) are seen.
Pyramid seaweed may have tiny bumps near the stem. These are probably
reproductive structures (receptacles).
According to AlgaeBase:
there are 30 current Turbinaria species.
Human uses: Pyramid seaweed is
eaten by people (apparently best eaten boiled then pickled), used
as fertiliser, pesticide, insecticide and insect repellent as well
as medicine to treat fever in children (mixed with other seagrasses,
boiled and the steam inhaled). It is often a minor component of sargassum
seaweed (Sargassum sp.) harvests for commercial uses.
In Hawai'i, it is considered an introduced and thus alien, invasive
weed that affects the native marine life there.
Sisters Island, Jan 06
Short 'columns' on rocks facing waves.
Raffles Lighthouse, May 04
long stems in more sheltered areas.
Pulau Semakau, Feb 07
Tiny bumps reproductive structures?
Raffles Lighthouse, Jul 06
Sisters Islands, Jan 06
Sisters Island, Aug 07
Some have spines on the edges.
seaweeds on Singapore shores
*Seaweed species are difficult to positively identify without microscopic
On this website, they are grouped by external features for convenience of
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.
Turbinaria conoides f. laticuspidata
Turbinaria conoides f. retroflexa
Turbinaria ornata var. serrata
- Pham, M.
N., H. T. W. Tan, S. Mitrovic & H. H. T. Yeo, 2011. A
Checklist of the Algae of Singapore, 2nd Edition. Raffles
Museum of Biodiversity Research, National University of Singapore,
Singapore. 99 pp. Uploaded 1 October 2011. [PDF, 1.58 MB]
- Chou, L.
M., 1998. A
Guide to the Coral Reef Life of Singapore. Singapore Science
Centre. 128 pages.
John M. 2000. Marine
Plants of Australia
University of Western Australia Press. 300pp.
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.