Introduced Marine Aquatic Invaders - a field guideJoin the Anti-Pest ProgramMarine pests what are theyHow pests get here What damage they do What we are doing What I can do? Northern Pacific Seastar Green CrabPacific OysterAeolid NudibranchNew Zealand Screw ShellAsian MusselBlack Striped Mussel Chinese ClamEuropean Fan WormJapanese Goby Japanese Seaweed Bryozoan
Introduced Marine Aquatic Invaders - a field guide
Introducted Marine Species - Japanese Seaweed
Undaria pinnatifida
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| Japanese Seaweed - Undaria pinnatifida Photo: CSIRO Marine Research |
Australia Invasion
- Tasmania and Victoria
Habitat
- temperate waters
- sheltered reef areas subject to oceanic influence
- intertidal to subtidal zone (to 15 metres)
ID Features
- up to 3 metres high
- usually golden brown in colour
- strap-like midrib up to 3 cm wide runs full length of plant body
- blade terminates well short of base of plant
- young fronds are simply a blade and have no distinct pinnae
- distinctive sporophyll at the base of the plant*
- holdfast (roots) attaches to substrate
* distinguishing feature
More information
More detailed information on this Marine Invader is available here.
...More Information on this Invader
Similar Native Marine Species
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| Ecklonia radiata Photo: John Huisman |
Ecklonia radiata
- up to 2 metres high
- darker in colour than Japanese seaweed
- variety of forms, in deep water has a long stipe and smooth fronds, in shallow water has a short stipe and is often densely covered with spines
- moderately exposed reefs to 44 metres in depth
- large quantities are washed ashore
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