Thick rounded singular central stalk (stipe) giving rise to one or two large, long and broad leathery fronds. Holdfast at base large disc. Dark brown. Up to 8 m long (thallus).
This large kelp is often found washed ashore on ocean beaches or drifting in the water after large seas break the suction of the holdfast and detach the plant from rocks. Holes in its fronds are from grazing snails and other invertebrates. In Tasmania, it is harvested from rack seaweed (washed ashore seaweeds) to produce alginates for use in commercial products such as toothpaste and ice cream.
Fringe of intertidal areas to subtidal rocky reefs, with high wave action, to depth of 30 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