Sheet-like wide, flattened frond with strong mid-rib arising from undulating, frill-like section at base of stalk (stipe), attached to rock or hard surface. Holdfast with multiple root-like (haptera) projections. Medium brown. Up to 1 m (thallus).
This species is introduced and common on piers. It is an annual seaweed which dies-off during winter. It is a food source for humans, known commercially as "Wakame" in Japan, China and Korea where it is harvested.
Low rocky intertidal reefs and subtidal rocky reefs in sheltered waters, to depth of 20 m.
Photosynthetic - sunlight
Introduced to Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed