PORT PHILLIP BAY


Brown Seaweed 

Undaria pinnatifida

View scientific description and taxonomy

Scientific Details

Superficially similar to Ecklonia radiata but distinguishable by base of stalk (frill or no frill), texture of frond (slimy or smooth/leathery) and mid-rib (present or absent).

Main information sources:
Womersley, H.B.S., (1984-2003). The Marine Benthic Flora of Southern Australia. Part 1-3d. Govt. Printer, South Australia.
Baldock, R.N. 2010. Algae Revealed. South Australian State Herbarium. Website.
AlgaeBase. Website.

Taxonomy

Phylum:
Ochrophyta
Subphylum:
Phaeista
Superclass:
Fucistia
Class:
Phaeophyceae
Order:
Laminariales
Family:
Alariaceae
Genus:
Undaria
Species:
pinnatifida

General Description

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).

Biology

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.

Habitat

Low rocky intertidal reefs and subtidal rocky reefs in sheltered waters, to depth of 20 m.

Reefs

Distribution guide

Worldwide.

Species Group

Seaweeds and seagrasses Brown algae

Depth

Shallow (1-30 m)

Water Column

On or near sea floor

Max Size

1 m

Diet

Photosynthetic - sunlight

Commercial Species

Yes

Global Dispersal

Introduced to Australia

Identify

Conservation Status

  • DSE Advisory List : Not listed
  • EPBC Act 1999 : Not listed
  • IUCN Red List : Not listed

Author

article author Pocklington, Jacqui

Jacqui Pocklington is a Research Associate with expertise in algal taxonomy.

citation

Cite this page as:
Pocklington, Jacqui, 2011, Brown Seaweed, Undaria pinnatifida, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 17 Aug 2017, http://portphillipmarinelife.net.au:8098/species/11321

Text: creative commons cc by licence