Chlorodesmis fastigiata, sometimes called turtle weed,[1] is a species of algae belonging to the family Udoteaceae.

It was relocated to the genus Chlorodesmis in 1969 by Sophie Charlotte Ducker.

[3] It also has two heterotypic synonyms: Chlorodesmis comosa Harvey & Bailey 1851 and Avrainvillea comosa (Harvey & Bailey) G.Murray & Boodle 1889.

[4] C. fastigiata grows in marine waters.

The species is found primarily in the Indian Ocean and the western central Pacific Ocean.