- Kingdom: Animalia
- Phylum: Mollusca
- Class: Gastropoda
- Subclass: Heterobranchia
- Order: Nudibranchia
- Suborder: Euctenidiacea
- Infraorder: Doridacea
- Superfamily: Onchidoridoidea
- Family: Onchidorididae
- Scientific name: Onchidoris bilamellata
- Norwegian: -
Characteristics:
The color is white with splashes of brown on the mantle. It can grow to a length of 4 cm.
Habitat:
It can be found on rocky locations from the subtidal zone and down to 20 meters. As the name indicates, the main diet is barnacles.
Distribution:
The barnacle-eating Onchidoris is widespread in the North Atlantic Oceans. There are registrations from North-America, Greenland, Iceland, The White Sea, Norway, the British Isles and France.