[2] The seaweed has an olive green to bright green thallus that spreads outward to around 12 to 20 centimetres (4.7 to 7.9 in) forming dense clumps[2] on coral rubble among seagrasses.

The stems are about 4 to 6 centimetres (1.6 to 2.4 in) in length and have small bristles composed of many fine branched filaments, that are arranged in whorls around the stolon in the middle so that it resembles a stiff bottlebrush.

[1] The species was first formally described in 1837 by the botanist Camille Montagne as part of the work Centurie de plantes cellulaires exotiques nouvelles as published in Annales des Sciences Naturelles, Botanique, Seconde série.

[3] The species is found in warmer waters in sediment or in coral reefs.

In Western Australia, it is found along the coast in the Kimberley region extending south to the Houtman Abrolhos.