Caulerpa cylindracea

{{Short description|Species of seaweed}}

{{speciesbox

|image = Caulerpa cylindracea (10.3897-BDJ.9.e64535) Figure 6.jpg

|image_caption = Dense colonies of invasive Caulerpa cylindracea in Algeria

|name =

|status=

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|genus = Caulerpa

|species = cylindracea

|authority = Sond.

|synonyms = *Caulerpa racemosa var. cylindracea (Sonder) Verlaque, Huisman & Boudouresque, 2003

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Caulerpa cylindracea is a species of seaweed (green algae) in the Caulerpaceae family.{{FloraBase|name=Caulerpa cylindracea|id=44539}}

It is native to the Australian coast in a large area extending from around Perth north into the Mid West and Pilbara to the Kimberley region of Western Australia.

Caulerpa cylindracea was unintentionally introduced to the Mediterranean in the early 1990s, where it has spread extensively and is considered an invasive species.{{cite journal |last1=Montefalcone |first1=Monica |last2=Morri |first2=Carla |last3=Parravicini |first3=Valeriano |last4=Bianchi |first4=Carlo Nike |title=A tale of two invaders: divergent spreading kinetics of the alien green algae Caulerpa taxifolia and Caulerpa cylindracea |journal=Biological Invasions |date=26 May 2015 |volume=17 |issue=9 |pages=2717–2728 |doi=10.1007/s10530-015-0908-1|bibcode=2015BiInv..17.2717M |s2cid=1973648 |hdl=11567/817427 |hdl-access=free }} It is also considered invasive in South Australia where it can overgrow and out-compete native species.{{Cite web|url=https://pir.sa.gov.au/biosecurity/aquatics/aquatic_pests/search_aquatic_pest_species?queries_environment_query=&queries_presence_query=Established&search_page_293278_submit_button=show¤t_result_page=1&results_per_page=0&submitted_search_category=&mode=|title=Search aquatic pest species|last=Department of Primary Industries and Regions|first=South Australia|date=2017-05-30|website=pir.sa.gov.au|language=en-au|access-date=2019-05-28}}