| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Orthopyxis compressa (Clark, 1877) |
Eastern Pacific | ||
| Orthopyxis crenata (Hartlaub, 1901) |
Southwest Pacific | ||
| Orthopyxis everta (Clark, 1876) |
Eastern Pacific and the Mediterranean | ||
| Orthopyxis integra (MacGillivray, 1842) |
Atlantic, Pacific, Mediterranean, Black Sea and Arctic Oceans | ||
| Orthopyxis minor (Fraser, 1938) |
Eastern Pacific | ||
| Orthopyxis mollis (Stechow, 1919) |
Soft bell hydroid | Pacific and the Mediterranean | |
| Orthopyxis sargassicola (Nutting, 1915) |
Western Atlantic | ||
| Orthopyxis tincta (Hincks, 1861) |
Antarctic Indian Ocean |