- Cionistes Wright, 1861
- Cytandraea Fowler, 1900
- Echinochorium Hassall, 1841
- Euhydractinia Broch, 1910
- Halorhiza Stechow, 1962
- Hydractinea Allman, 1864
- Hydroctinia Schydlowsky, 1902
- Hydrodendrium Nutting, 1906
- Hydrodendrium Stechow, 1909
- Hydronema Stechow, 1921
- Kionistes Wright, 1863
- Nuttingia Stechow, 1909
- Oorhiza Mereschkowsky, 1877
- Oorhyza Schydlowsky, 1902
- Padocoryne Claus, 1876
- Podocaryna Beneden, 1867
- Podocorella Stechow, 1921
- Rhysio Brinckmann, 1965
- Synhydra Quatrefages, 1843
- Synhydre Beneden, 1844
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