| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Thyonidium alexandri Fisher, 1907 |
To be filled | ||
| Thyonidium drummondii (Thompson, 1840) |
North Atlantic | ||
| Thyonidium hawaiiense Fisher, 1907 |
To be filled | ||
| Thyonidium kurilensis Levin, 1984 |
Northeast Pacific and Northern Atlantic | 20 | |
| Thyonidium molle Selenka, 1867 |
To be filled | ||
| Thyonidium pellucidum (Fleming) |
Northeast Atlantic |