Caulerpa sedoides

The species was first formally described by the botanist Carl Adolph Agardh in 1817 as part of the work Synopsis algarum Scandinaviae, adjecta dispositione universali algarum.^[4] It was once known as Caulerpa germinata.^[3]

It is found mostly in the waters of southern Australia with its range extending from southern Queensland, Victoria, Tasmania and the coast of South Australia.^[1] In Western Australia, this species is found along the coast in the Mid West region and along much of the southern coastline to east of Esperance.^[2] C. sedoides is also found in waters around New Zealand, some Pacific Islands and South Korea.^[3] The seaweed with the intertwined runners and is often found in rock pools around the low tide level in rough water areas up to a depth of 25 metres (82 ft).^[1]