Ulvophyceae
 The Ulvophyceae or ulvophytes are a class of green algae distinguished mainly on the basis of ultrastructural morphology life cycle and molecular phylogenetic data. The sea lettuce Ulva belongs here. Other well-known members include Caulerpa and Acetabularia.The Ulvophytes are diverse in their morphology and their habitat. Most are seaweeds such as those listed above.