| Ulva muscoides Clemente, 1807 |
| Ulva nematoidea Bory, 1828 |
| Ulva ohnoi M. Hiraoka & S. Shimada, 2004 |
| Ulva oxysperma Kütz., 1843 |
| Ulva paradoxa C. Agardh, 1817 |
| Ulva pertusa Kjellm. |
| Ulva plumosa Huds., 1778 |
| Ulva polypodioides De Candolle, 1805 |
| Ulva profunda W.R. Taylor, 1928 |
| Ulva prolifera O.F. Müll., 1778 |
| Ulva radiata (J. Agardh) Hayden, Blomster, Maggs, P.C. Silva, Stanhope & Waaland, 2003 |
| Ulva ramulosa Sm., 1810 |
| Ulva rigida C. Agardh, 1823 |
| Ulva scagelii Chihara, 1968 |
| Ulva sinuosa Mert. & Roth, 1806 |
| Ulva spinulosa Okamura & Segawa, 1936 |
| Ulva stenophylla Setch. & N.L. Gardner, 1920 |
| Ulva taeniata (Setch.) Setch. & N.L. Gardner, 1920 |
| Ulva tanneri H.S. Hayden & Waaland, 2003 |
| Ulva tepida Masakiyo & S. Shimada, 2014 |