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Common Periwinkle
Littorina littorea
496 observations
Common Atlantic Slippersnail
Crepidula fornicata
457 observations
Brown-lipped Snail
Cepaea nemoralis
395 observations
Atlantic Ribbed Mussel
Geukensia demissa
303 observations
Northern Quahog
Mercenaria mercenaria
286 observations
Blue Mussel
Mytilus edulis
214 observations
Channeled Whelk
Busycotypus canaliculatus
184 observations
Atlantic Bay Scallop
Argopecten irradians
176 observations
West Atlantic Surfclam
Spisula solidissima
145 observations
Eastern Oyster
Crassostrea virginica
143 observations
Eastern Oyster Drill
Urosalpinx cinerea
138 observations
Common Jingle
Anomia simplex
136 observations
Eastern Mudsnail
Ilyanassa obsoleta
115 observations
Knobbed Whelk
Busycon carica
97 observations
Leopard Slug
Limax maximus
94 observations
Soft-shelled Clam
Mya arenaria
66 observations
Shark Eye
Neverita duplicata
64 observations
Changeable Mantleslug
Megapallifera mutabilis
63 observations
Threeline Mudsnail
Ilyanassa trivittata
56 observations
Northern Lacuna
Lacuna vincta
53 observations
Atlantic Jackknife
Ensis leei
53 observations
Common Whelk
Buccinum undatum
51 observations
Flat Periwinkle
Littorina obtusata
45 observations
Naked Sea Butterfly
Clione limacina
45 observations
Blood Ark
Lunarca ovalis
45 observations
Transverse Ark
Anadara transversa
41 observations
Northern Moonsnail
Euspira heros
34 observations
Rough Periwinkle
Littorina saxatilis
31 observations
Well-ribbed Dove Snail
Costoanachis translirata
31 observations
Stout Tagelus
Tagelus plebeius
30 observations
Atlantic Dogwhelk
Nucella lapillus
29 observations
Longfin Inshore Squid
Doryteuthis pealeii
28 observations
False Angelwing
Petricolaria pholadiformis
28 observations
Eastern Whitelip
Neohelix albolabris
26 observations
Rounded Snail
Gonyodiscus rotundatus
25 observations
Chinese Mystery Snail
Margarya chinensis
25 observations
Asian Clam
Corbicula fluminea
24 observations
Meadow Slug
Deroceras laeve
24 observations
Eastern Elliptio
Elliptio complanata
23 observations
Milky Slug
Deroceras reticulatum
20 observations
Chestnut Clam
Isocrassina castanea
20 observations
Lunate Dove Shell
Astyris lunata
19 observations
Western Dusky Slug
Arion subfuscus
18 observations
Tortoiseshell Limpet
Testudinalia testudinalis
18 observations
Spotted Moonsnail
Euspira triseriata
18 observations
Northern Horse Mussel
Modiolus modiolus
16 observations
Thick-lipped Drill
Eupleura caudata
16 observations
Cross-hatched Lucine
Divalinga quadrisulcata
16 observations
Bushy-backed Nudibranch
Dendronotus frondosus
15 observations
Northern Cardita
Cyclocardia borealis
15 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)
- Channeled Whelk (Busycotypus canaliculatus)
- Atlantic Bay Scallop (Argopecten irradians)
- West Atlantic Surfclam (Spisula solidissima)
- Eastern Oyster (Crassostrea virginica)
- The most observed mollusc in Rhode Island is Common Periwinkle (Littorina littorea), with 496 recorded observations.