One to three main stems (stipes). Lower branch (primary axis) cyclindrical. Upper primary branch compressed with a midrib, branching on one plane. Basal laterals resemble alternate pinnate leaves. Upper laterals are irregularly branched and can be thread-like (filiform) through to compressed. Vesicles when present are on a stalk (petiolate), almost round (subspherical), with a short protrusion (mucro). Holdfast disc-like (discoid) to conical. Dark brown. Up to 45 cm long (thallus).
This species was recently reviewed using morphological and molecular data and moved from the genus Sargassum to the genus Sargassopsis.
Shallow subtidal rocky reefs and tidal pools in rough waters, to depth of 5 m.
New Zealand and Australia.
Photosynthetic - sunlight
Recorded in Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed