Codium duthiae

{{short description|Species of seaweed}}

{{one source|date=November 2019}}

{{speciesbox

| image = Codium duthieae P.Silva (AM AK26760-2).jpg

| image_alt = Herbarium specimen of "Codium duthiae"

| image_caption = Herbarium specimen of Codium duthiae

|status=

|status_system=

|genus = Codium

|species = duthiae

|authority = P.C.Silva

|}}

Codium duthiae is a species of seaweed in the Codiaceae family.{{FloraBase|name=Codium duthiae|id=26671}}

The epilithic green marine alga typically grows to a height of {{convert|60|cm|in|0}}. It has a discoid holdfast with spongy erect fronds on terete branches.

It is found on coastal area with light to moderate water movement from the low tide mark to a depth of {{convert|25|m|ft|0}}

In Western Australia is found along the coast near Shark Bay extending down around the south coast. Its range extends around southern Australia to Victoria and northern Tasmania