An alga that resembles a cactus, with large club-like beads (vesiculate) arranged in an opposing pattern on one plane (distichous) of the main axis that arise from rhizomes (roots). Medium to dark green. Up to 40 cm long (thallus).
The shape and height of this bulky alga can vary somewhat due to the intensity of wave exposure in the area. Some species of nudibranchs are associated with this alga, having a body that closely resembles the uniquely shaped beads. Tropical species of this genus are used for ornamental decoration in household aquariums.
Within and adjacent to seagrass beds, in tidal pools in areas of rough water, and sandy-mud sediments in rough and calm waters, to depth of 38 m.
Photosynthetic - sunlight
Native to Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed