Red-gilled mud worm
- kingdom: Animalia
- phylum: Annelida
- class: Polychaeta
- order: Spionida
- family: Spionidae
- genus: Marenzelleria
- species: Marenzelleria neglecta
- Bornem
Flanders
Belgium- Krokek
- Valdemarsvik
Östergötland
Sweden- Mayo
Maryland
United States