| Scientific Name | Author | English Name |
|---|---|---|
| Hancockia burni | Thompson, 1972 | Burn's hancockia |
| Hancockia californica | MacFarland, 1923 | Hancock's nudibranch |
| Hancockia ryrca | Marcus, 1957 | |
| Hancockia schoeferti | Schrödl, 1999 | Seaweed flame sea slug |
| Hancockia uncinata | (Hesse, 1872) |