Long, straight, rubbery multiple stalks (stipe), with oval-shaped floats arising on short branches in a random alternate pattern giving rise to elongate flattened blades. Blades are narrow, long and have a wrinkled appearance (longitudinally corrugated). Holdfast at base is root-like with entangled branches (haptera). Medium to dark brown. Up to 10 m long (thallus).
This is the largest canopy-forming kelp species in Victoria. It has been declining in recent years and is listed as an endangered ecological community nationally under the Environment Protection and Biodiversity Conservation Act. It is the first ecological community to be listed as endangered in Australia. Recent taxonomic review found that the species previously referred to as Macrocystis angustifolia is the same as Macrocystis pyrifera.
Subtidal rocky reefs, moderate to exposed wave action, to depth of 10 m.
North and South America, New Zealand, and south-eastern Australia.
Photosynthetic - sunlight
Recorded in Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Endangered
- IUCN Red List : Not listed