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European Flat Oyster
Ostrea edulis
213 observations
Atlantic Dogwhelk
Nucella lapillus
90 observations
Common Periwinkle
Littorina littorea
73 observations
Common European Limpet
Patella vulgata
59 observations
Common Atlantic Slippersnail
Crepidula fornicata
57 observations
Grey Topshell
Steromphala cineraria
48 observations
Blue Mussel
Mytilus edulis
46 observations
Grey Mail-shell
Lepidochitona cinerea
38 observations
Purple Topshell
Steromphala umbilicalis
36 observations
Common Whelk
Buccinum undatum
34 observations
Sea Lemon
Archidoris pseudoargus
29 observations
Aeolidia filomenae
Aeolidia filomenae
23 observations
European cowrie
Trivia monacha
20 observations
barnacle-eating dorid
Onchidoris bilamellata
19 observations
Northern Horse Mussel
Modiolus modiolus
19 observations
Great Scallop
Pecten maximus
19 observations
Garden Snail
Cornu aspersum
19 observations
Blue-rayed Limpet
Patella pellucida
18 observations
Common Cockle
Cerastoderma edule
18 observations
European Painted Top Shell
Calliostoma zizyphinum
15 observations
Spotted Seahare
Aplysia punctata
13 observations
Queen scallop
Aequipecten opercularis
13 observations
Pullet Carpet Shell
Venerupis corrugata
13 observations
Crowned Aeolis
Facelina auriculata
13 observations
Hairy Spiny Dorid
Acanthodoris pilosa
11 observations
Velvet Dorid
Jorunna tomentosa
11 observations
Rough Periwinkle
Littorina saxatilis
10 observations
Marsenia perspicua
Marsenia perspicua
10 observations
Angular Seaslug
Okenia nodosa
10 observations
Brown-lipped Snail
Cepaea nemoralis
9 observations
Side-gilled Seaslug
Berthella plumula
8 observations
Boston Facelina
Facelina bostoniensis
8 observations
White Aeolis
Favorinus branchialis
8 observations
Soft-shelled Clam
Mya arenaria
7 observations
Netted Dogwhelk
Tritia reticulata
7 observations
Littorina fabalis
Littorina fabalis
7 observations
Pod Razor
Ensis siliqua
6 observations
Rayed Artemis
Dosinia exoleta
6 observations
Common Tower Shell
Turritellinella tricarinata
6 observations
citrine nudibranch
Pelagella castanea
6 observations
Humped Ancula Sea Slug
Ancula gibbosa
5 observations
Curled Octopus
Eledone cirrhosa
5 observations
Orange-clubbed Sea Slug
Limacia clavigera
5 observations
Flat Periwinkle
Littorina obtusata
4 observations
Four-lined Polycera
Polycera quadrilineata
4 observations
Rough Side-gilled Seaslug
Pleurobranchus membranaceus
4 observations
Geitodoris planata
Geitodoris planata
4 observations
Great Ram's-horn
Planorbarius corneus
3 observations
Northern cowrie
Trivia arctica
3 observations
Otter shell
Lutraria lutraria
3 observations
Frequently Asked Questions
- The 10 most common molluscs in North Down are:
- European Flat Oyster (Ostrea edulis)
- Atlantic Dogwhelk (Nucella lapillus)
- Common Periwinkle (Littorina littorea)
- Common European Limpet (Patella vulgata)
- Common Atlantic Slippersnail (Crepidula fornicata)
- Grey Topshell (Steromphala cineraria)
- Blue Mussel (Mytilus edulis)
- Grey Mail-shell (Lepidochitona cinerea)
- Purple Topshell (Steromphala umbilicalis)
- Common Whelk (Buccinum undatum)
- The most observed mollusc in North Down is European Flat Oyster (Ostrea edulis), with 213 recorded observations.