| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Diphasia alternata Galea, 2019 |
Western Central Pacific | ||
| Diphasia attenuata (Hincks, 1866) |
Western Central Pacific and Southwest Atlantic | ||
| Diphasia corniculata (Murray, 1860) |
Eastern Pacific | ||
| Diphasia digitalis (Busk, 1852) |
Western Central Pacific and Western Atlantic | ||
| Diphasia fallax (Johnston, 1847) |
Atlantic and Arctic Oceans | ||
| Diphasia nigra (Pallas, 1766) |
Northeast Atlantic | ||
| Diphasia pinaster Ellis & Solander, 1786 |
Northeast Atlantic | ||
| Diphasia pinastrum (Cuvier, 1830) |
Sea pine hydroid | Atlantic Ocean and the Mediterranean | |
| Diphasia rosacea (Linnaeus, 1758) |
Lily hydroid | Northeast Atlantic | |
| Diphasia tropica Nutting, 1904 |
Western Atlantic |