| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Halammohydra adherens Swedmark & Teissier, 1958 |
Northeast Atlantic | ||
| Halammohydra coronata Clausen, 1967 |
Northeast Atlantic | ||
| Halammohydra intermedia Clausen, 1967 |
Northeast Atlantic | ||
| Halammohydra octopodides Remane, 1927 |
Northeast Atlantic, Mediterranean and Western Indian Ocean | 0.04 | |
| Halammohydra schulzei Remane, 1927 |
Arctic, Atlantic Ocean, Mediterranean and Western Indian Ocean | 0.08 | |
| Halammohydra vermiformis Swedmark & Teissier, 1857 |
Northeast Atlantic | 0.13 |