Colony of individual polyps (hydranths) joined by root-like network of tubular stolons at the base. Colony shape is feather-like (pinnate). Colour: buff to dark greyish-brown, sometimes covered by pink coralline alga. Up to 5 cm high.
These hydroids are widespread in southern Australian seas although some are small and cryptic and therefore not easily seen. Their colonies grow throughout the year, and are fertile in winter.
Tidal channels and reef in areas of strong current flow.
Plankton or Particles
Generally not harmful but still able to sting bare skin.
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed