| Acanthocodium Suringar, 1867 |
| Acanthocodium fragile Suringar, 1867 |
| Codiaceae Kütz., 1843 |
| Codium Stackh., 1797 |
| Codium amplivesiculatum Setch. & N.L. Gardner, 1924 |
| Codium anastomosans Setch. & N.L. Gardner, 1924 |
| Codium brandegeei Setch. & N.L. Gardner, 1924 |
| Codium carolinianum Searles, 1972 |
| Codium cervicorne Setch. & N.L. Gardner, 1924 |
| Codium conjunctum Setch. & N.L. Gardner, 1924 |
| Codium cuneatum Setch. & N.L. Gardner, 1924 |
| Codium cylindricum Holmes, 1896 |
| Codium dawsonii P.C. Silva, Pedroche & M.E. Chacana, 2014 |
| Codium decorticatum (Woodward) M. Howe, 1911 |
| Codium dichotomum Gray, 1821 |
| Codium elongatum C. Agardh, 1823 |
| Codium fragile (Suringar) Har., 1889 |
| Codium fragile subsp. fragile (Suringar) Har., 1889 |
| Codium fragile subsp. mexicanum C.A. Maggs, 2007 |
| Codium fragile subsp. tomentosoides (Goor) P.C. Silva, 1955 |