| Ceramium brevizonatum H.E. Petersen, 1918 |
| Ceramium brevizonatum var. brevizonatum H.E. Petersen, 1918 |
| Ceramium brevizonatum var. caraibicum H.E. Petersen & Børgesen, 1924 |
| Ceramium byssoideum Harv., 1853 |
| Ceramium californicum J. Agardh, 1894 |
| Ceramium camouii E.Y. Dawson, 1944 |
| Ceramium caudatum Setch. & N.L. Gardner, 1924 |
| Ceramium cimbricum Petersen, 1924 |
| Ceramium cimbricum f. cimbricum H.E. Petersen, 1924 |
| Ceramium cimbricum f. flaccidum (Petersen) G. Furnari & Serio, 1996 |
| Ceramium clarionense Setch. & N.L. Gardner, 1930 |
| Ceramium clavulatum C. Agardh, 1822 |
| Ceramium codicola J. Agardh, 1894 |
| Ceramium codii (Richards) Feldm. -Maz., 1938 |
| Ceramium comptum Børgesen, 1924 |
| Ceramium corniculatum Mont., 1861 |
| Ceramium cruciatum Collins & Herv., 1917 |
| Ceramium dawsonii A.B. Joly, 1957 |
| Ceramium deslongchampsii Chauvin, 1830 |
| Ceramium diaphanum (Ligthfoot) Roth, 1806 |