Ulvaceae

{{Short description|Family of algae}}

{{Automatic taxobox

| image = Ulva lactuca - Sowerby.jpg

| image_caption = Ulva lactuca

| taxon = Ulvaceae

| authority = (J.V.Lamour.) Dumort. (1822)

| subdivision_ranks = Genera

| subdivision = See text

}}

Ulvaceae ({{IPAc-en|əl|ˈ|v|eɪ|s|i|.|iː|,_|-|ˌ|aɪ}}) is a widely distributed family of thin green algae characterized by a flat or a hollow tubular thallus, reproducing via conjugation of planogametes or zoospores, and classified within the orders Ulotrichales or, more commonly, Ulvales.{{cite Merriam-Webster|Ulvaceae |access-date=2021-02-05}}