| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Thalassema arcassonense Cuénot, 1902 |
Northeast Atlantic | ||
| Thalassema hartmani Fisher, 1947 |
Western Atlantic | ||
| Thalassema malakhovi Popkov, 1992 |
Southwest Pacific | 6 | |
| Thalassema philostracum Fisher, 1947 |
Central Atlantic | ||
| Thalassema thalassemum (Pallas, 1774) |
Northeast Atlantic and the Mediterranean |