- Acochlidiidae
- Acteonidae
- Actinocyclidae
- Aegiridae, Notodorididae
- Aeolidiidae, Nudibranchs
- Aglajidae
- Akeridae
- Aldisidae
- Aplustridae, Hydatinidae
- Aplysiidae, Dolabellidae
- Aranucidae, Marianinidae
- Arminidae
- Bathydorididae
- Bornellidae
- Bosellidae
- Bullactidae
- Bullidae, Bubble shells
- Bullinidae
- Caliphyllidae, Polybranchiidae
- Calmidae
- Cavoliniidae
- Charcotiidae, Lemindidae
- Chromodorididae, Cadlinidae
- Clionidae, Marine boring sponges
- Cliopsidae
- Conualeviidae
- Corambidae
- Cylichnidae, Acteocinidae
- Cylindrobullidae
- Cymbuliidae
- Dendrodorididae
- Dendronotidae
- Desmopteridae
- Diaphanidae
- Dironidae
- Discodorididae, Asteronotidae
- Dorididae, Aldisidae
- Doridomorphidae, Doridoeididae
- Doridoxidae
- Dotidae, Dotoidae
- Embletoniidae
| - Eubranchidae
- Facelinidae, Babakinidae
- Fionidae
- Flabellinidae, Coryphellidae
- Gastropteridae, Gasteropteridae
- Glaucidae
- Goniaeolididae, Gonieolididae
- Goniodorididae, Okeniidae
- Gymnodorididae
- Haminoeidae, Atys bubble shell
- Hancockiidae
- Hedylopsidae
- Hermaeidae
- Heroidae
- Heterodorididae
- Hexabranchidae
- Homoiodorididae
- Hydromylidae
- Juliidae
- Laginiopsidae
- Limacinidae
- Limapontiidae, Costasiellidae
- Livorniellidae
- Lomanotidae
- Madrellidae
- Mandeliidae
- Microhedylidae
- Minicheviellidae
- Nossidae
- Notaeolidiidae
- Notobranchaeidae
- Notodiaphanidae
- Okadaiidae, Vayssiereidae
- Onchidorididae, Calycidorididae
- Oxynoidae
- Paedophoropodidae
- Palliohedylidae
- Parhedylidae, Microhedylidae
- Pelseneeridae
- Peraclidae, Peraclididae
- Peraclididae
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