_- Acontiophoridae
- Actinernidae
- Actiniidae
- Actinodendridae
- Actinoscyphiidae
- Actinostolidae
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- Aiptasiomorphidae
- Aliciidae
- Amphianthidae
- Andresiidae
- Andvakiidae
- Antipodactinidae
- Bathyphelliidae
- Boloceroididae
- Capneidae
- Condylanthidae
- Diadumenidae
- Edwardsiidae
- Exocoelactinidae
- Galatheanthemidae
- Gonactiniidae
- Halcampidae
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- Halcuriidae
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- Haloclavidae
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- Hormathiidae
- Iosactinidae
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- Isophellidae
- Isophelliidae
- Kadosactinidae
- Limnactiniidae
- Liponematidae
- Metridiidae
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- Nevadneidae
- Octineonidae
- Phelliidae
- Phymanthidae
- Polyopidae
- Preactiniidae
- Ptychodactinidae
- Sagartiidae
- Sagartiomorphidae
- Stichodactylidae
- Thalassianthidae