Caulerpa cactoides

{{Use dmy dates|date=October 2023}}

{{Short description|Species of seaweed}}

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{{speciesbox

|name =

| image = Caulerpa cactoides.jpeg

| image_alt =

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|status=

|status_system=

|genus = Caulerpa

|species = cactoides

|authority = (Turner) C.Agardh

|}}

Caulerpa cactoides is a species of seaweed in the Caulerpaceae family.{{FloraBase|name=Caulerpa cactoides|id=26555}}

It is found along the coast in a large area extending from near Exmouth in the northern Gascoyne region to east of Esperance in the Goldfields-Esperance region of Western Australia.