barnacle-eating onchidoris
- kingdom: Animalia
- phylum: Mollusca
- class: Gastropoda
- order: Nudibranchia
- family: Onchidorididae
- genus: Onchidoris
- species: Onchidoris bilamellata
- Saint Andrews
New Brunswick
Canada- Billdal
Västra Götaland
Sweden- Scarborough
England
United Kingdom- Albany
California- Branford
- Branford Center
- Poquonock Bridge
Connecticut- Bremerton
- Parkwood
- Port Orchard
Washington
United States