Scientific name

Undaria pinnatifida

Image of Wakame. The scientific name, Undaria pinnatifida. This image was taken by P. Watson.

Key features

Key features of Wakame include:

  • frilly growth (sporophyll) at base of plant
  • usually found in cooler months
  • well defined mid-rib running up length of blade
  • smooth, thin blades that stop well before base of plant
  • green/brown.


The Wakame:

  • found from low tide mark to 20m
  • rock, reef and stones, artificial structures (marinas, moorings, etc.) and aquaculture equipment.


The Wakame:

  • can rapidly colonise areas previously devoid of large algal species.

Known established populations

The Wakame is currently present in Port Phillip Bay, Apollo Bay harbour, Port Welshpool, Portland.

Report a marine pest sighting

Report any unusual marine species immediately using our online reporting system. Early reporting increases the chance of effective control and eradication. Please take good quality photos of the pests or damage to include in your report where possible.

Alternatively, you can call the Agriculture Victoria Customer Service Centre 136 186.

Report a sighting

Page last updated: 06 Jul 2023