Nudibranchs and Sea Slugs Genus
| Genus | Family | Sample species | # Species |
|---|---|---|---|
| Dendronotus | Dendronotidae | 6 | |
| Dermatobranchus | Arminidae | 5 | |
| Diaphorodoris | Onchidorididae | 3 | |
| Diaulula | Discodorididae | 1 | |
| Digidentis | Chromodorididae | 1 | |
| Dirona | Dironidae | 3 | |
| Discodoris | Discodorididae | 3 | |
| Dolabella | Aplysiidae | 1 | |
| Dolabrifera | Aplysiidae | 1 | |
| Dondice | Facelinidae | 1 | |
| Doriopsilla | Dendrodorididae | 4 | |
| Doris | Dorididae | 5 |
