| Nausithoe marginata Kölliker, 1853 | 
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| Family: | Nausithoidae () | |||
| Max. size: | 2 cm WD (male/unsexed) | |||
| Environment: | pelagic; marine | |||
| Distribution: | Eastern Atlantic and the Mediterranean. | |||
| Diagnosis: | 2 cm wide, 0.8 cm high; 6 to 8 slender gastric filaments in each interradius; the four gonads crescent-shpaed with the horns recurved. | |||
| Biology: | ||||
| IUCN Red List Status: | Not Evaluated (N.E.) Ref. 123251) | |||
| Threat to humans: | ||||
| Country info: |  | |||