| Scientific Name | Author | English Name |
|---|---|---|
| Pennaria adamsia | Lendenfeld, 1884 | |
| Pennaria armata | Vanhoeffen, 1911 | |
| Pennaria disticha | Goldfuss, 1820 | Feather hydroid |
| Pennaria grandis | Kramp, 1928 | |
| Pennaria pauper | Kramp, 1959 | |
| Pennaria rosea | von Lendenfeld, 1885 | |
| Pennaria vitrea | Agassiz & Mayer, 1899 | |
| Pennaria wilsoni | Bale, 1913 |