Seaweed
"Seaweed" is a colloquial term and lacks a formal definition. A seaweed may belong to one of several groups of multicellular algae: the red algae, green algae, and brown algae. As these three groups do not have a common multicellular ancestor, the seaweed are in a polyphyletic group. In addition, some tuft-forming bluegreen algae (Cyanobacteria) are sometimes considered to be seaweed.
List of seaweeds and marine flowering plants of Australia (temperate waters)
The list of seaweeds and marine flowering plants of Australia (temperate waters) is a list of marine species that form a part of the flora of Australia.