Thalassodendron is a genus of seagrass in the family Cymodoceaceae, described as a genus in 1970.

[2][3] It grows along the shores of the Indian Ocean, the western Pacific Ocean and around Australasia.

[4] The genus was circumscribed by Cornelis den Hartog in Verh.

[4] The genus name of Thalassodendron is named after Thalassa, the Greek word for the 'sea' and for its divine female personification in Greek mythology and dendron the Greek word for Tree.

This Alismatales-related article is a stub.