| Nominal Species (n = 9) | Present allocation (n = 8) | Ref. |
|---|---|---|
| Cassiopea maremetens Gershwin, Zeidler & Davie, 2010 | Cassiopea maremetens | 3477 |
| Cassiopea mayeri Gamero-Mora, Collins, Boco, Geson III & Morandini, 2022 | Cassiopea mayeri | 3477 |
| Cassiopea medusa Light, 1914 | Cassiopea medusa | 3477 |
| Cassiopea mertensi Brandt, 1838 | Cassiopea mertensi | 19 |
| Cassiopea ndrosia Agassiz & Mayer, 1899 | Cassiopea ndrosia | 19 |
| Cassiopea ornata Haeckel, 1880 | Cassiopea ornata | 19 |
| Cassiopea picta Vanhöffen, 1888 | Cassiopea picta | 3125 |
| Cassiopea vanderhorsti Stiasny, 1922 | Cassiopea xamachana | 75097 |
| Cassiopea xamachana Bigelow, 1892 | Cassiopea xamachana | 19 |