Sigalion spinosus
- kingdom: Animalia
- phylum: Annelida
- class: Polychaeta
- order: Phyllodocida
- family: Sigalionidae
- genus: Sigalion
- species: Sigalion spinosus
Capitola- La Selva Beach
- Opal Cliffs
- Seacliff
- Twin Lakes
California
United States