n = 11
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Cassiopea andromeda | (Forsskål, 1775) | Cassiopea andromeda | Cassiopeidae | Upside-down jellyfish |
| Cassiopea frondosa | (Pallas, 1774) | Cassiopea frondosa | Cassiopeidae | Upsidedown jellyfish |
| Cassiopea maremetens | Gershwin, Zeidler & Davie, 2010 | Cassiopea maremetens | Cassiopeidae | |
| Cassiopea mayeri | Gamero-Mora, Collins, Boco, Geson III & Morandini, | Cassiopea mayeri | Cassiopeidae | |
| Cassiopea medusa | Light, 1914 | Cassiopea medusa | Cassiopeidae | |
| Cassiopea mertensi | Brandt, 1838 | Cassiopea mertensi | Cassiopeidae | |
| Cassiopea ndrosia | Agassiz & Mayer, 1899 | Cassiopea ndrosia | Cassiopeidae | |
| Cassiopea ornata | Haeckel, 1880 | Cassiopea ornata | Cassiopeidae | |
| Cassiopea picta | Vanhöffen, 1888 | Cassiopea picta | Cassiopeidae | |
| Cassiopea xamachana | Bigelow, 1892 | Cassiopea xamachana | Cassiopeidae | Upsidedown jelly |
| Cassiopea vanderhorsti | Stiasny, 1922 | Cassiopea xamachana | Cassiopeidae | Upsidedown jelly |