Resembles tiny delicate bunches of red grapes. Rigid central stem with irregular branching. Oval to club-like hollow beads (vesiculate laterals) are closely bunched together and attached by short stem (stipe) to branch. Disc shaped holdfast. Dark red-brown. Up to 30 cm long (thallus).
This alga often grows with, or is overgrown by, encrusting coralline and other algae. It is a common genus in tropical/sub-tropical areas.
Subtidal reefs with strong current flow, in calm to rough waters, to depth of 24 m.
Madagascar and Australia.
Photosynthetic - sunlight
Recorded in Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed