1. Uca Leach 1814
2. Ulva Linné 1753
3. Umbonium Link 1807
4. Uncinaria Frölich 1789
5. Undaria Suringar 1873
6. Upeneus Cuvier 1829
7. Upogebia Learch 1814
8. Uranoscopus Linnaeus 1758
9. Urocampus Günther 1870
10. Urocerus Geoffroy 1785
11. Urolepis Walker 1846
12. Urolophus J.P. Müller & Henle 1837
13. Urotrichus Temminck 1841
14. Utricularia Linné 1753