Chaetomorpha sp. Kützing
This alga has coarse, unbranched filaments. It is usually solitary or grow in tufts, either attached to rocks or shells, or are free-floating. They can form extensive mats of intertwining filaments.
Changi, Pulau Semakau, St John's Island
The alga forms thick mats of mixed filamentous green and blue-green algae in marine and brackish waters, as well as freshwater fish ponds.
A number of species are edible or used as fish food.
Prud’homme van Reine, W. F. & G. C. Trona Jr. (eds.) (2002). Plant resources of South-East Asia No. 15(1). Cryptogams: Algae. Prosea Foundation, Borgor, Indonesia. 318 pp.
Teo, L. W. & Y. C. Wee, 1983. Seaweeds of Singapore. Singapore University Press. 123 pp.