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Common Periwinkle
Littorina littorea
522 observations
Common Atlantic Slippersnail
Crepidula fornicata
490 observations
Brown-lipped Snail
Cepaea nemoralis
450 observations
Atlantic Ribbed Mussel
Geukensia demissa
319 observations
Northern Quahog
Mercenaria mercenaria
313 observations
Blue Mussel
Mytilus edulis
220 observations
Atlantic Bay Scallop
Argopecten irradians
196 observations
Channeled Whelk
Busycotypus canaliculatus
194 observations
West Atlantic Surfclam
Spisula solidissima
159 observations
Eastern Oyster
Crassostrea virginica
157 observations
Common Jingle
Anomia simplex
151 observations
Eastern Oyster Drill
Urosalpinx cinerea
150 observations
Eastern Mudsnail
Ilyanassa obsoleta
124 observations
Leopard Slug
Limax maximus
115 observations
Knobbed Whelk
Busycon carica
105 observations
Soft-shelled Clam
Mya arenaria
72 observations
Threeline Mudsnail
Ilyanassa trivittata
71 observations
Shark Eye
Neverita duplicata
69 observations
Changeable Mantleslug
Megapallifera mutabilis
64 observations
Atlantic Jackknife
Ensis leei
58 observations
Northern Lacuna
Lacuna vincta
57 observations
Blood Ark
Lunarca ovalis
52 observations
Common Whelk
Buccinum undatum
51 observations
Flat Periwinkle
Littorina obtusata
48 observations
Naked Sea Butterfly
Clione limacina
46 observations
Transverse Ark
Anadara transversa
43 observations
Rough Periwinkle
Littorina saxatilis
34 observations
Stout Tagelus
Tagelus plebeius
34 observations
Well-ribbed Dove Snail
Costoanachis translirata
34 observations
Northern Moonsnail
Euspira heros
34 observations
Western Dusky Slug
Arion subfuscus
33 observations
Longfin Inshore Squid
Doryteuthis pealeii
33 observations
False Angelwing
Petricolaria pholadiformis
32 observations
Atlantic Dogwhelk
Nucella lapillus
30 observations
Rounded Snail
Gonyodiscus rotundatus
28 observations
Chinese Mystery Snail
Margarya chinensis
28 observations
Eastern Whitelip
Neohelix albolabris
26 observations
Asian Clam
Corbicula fluminea
24 observations
Meadow Slug
Deroceras laeve
24 observations
Eastern Elliptio
Elliptio complanata
22 observations
Lunate Dove Shell
Astyris lunata
22 observations
Spotted Moonsnail
Euspira triseriata
21 observations
Cross-hatched Lucine
Divalinga quadrisulcata
21 observations
Milky Slug
Deroceras reticulatum
20 observations
Chestnut Clam
Isocrassina castanea
20 observations
Northern Horse Mussel
Modiolus modiolus
18 observations
Thick-lipped Drill
Eupleura caudata
18 observations
Tortoiseshell Limpet
Testudinalia testudinalis
18 observations
Morton's Cockle
Laevicardium mortoni
16 observations
Northern Cardita
Cyclocardia borealis
16 observations
Frequently Asked Questions
- The 10 most common molluscs in Rhode Island are:
- Common Periwinkle (Littorina littorea)
- Common Atlantic Slippersnail (Crepidula fornicata)
- Brown-lipped Snail (Cepaea nemoralis)
- Atlantic Ribbed Mussel (Geukensia demissa)
- Northern Quahog (Mercenaria mercenaria)
- Blue Mussel (Mytilus edulis)
- Atlantic Bay Scallop (Argopecten irradians)
- Channeled Whelk (Busycotypus canaliculatus)
- West Atlantic Surfclam (Spisula solidissima)
- Eastern Oyster (Crassostrea virginica)
- The most observed mollusc in Rhode Island is Common Periwinkle (Littorina littorea), with 522 recorded observations.