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Common Periwinkle
Littorina littorea
552 observations
Common Atlantic Slippersnail
Crepidula fornicata
516 observations
Brown-lipped Snail
Cepaea nemoralis
490 observations
Atlantic Ribbed Mussel
Geukensia demissa
333 observations
Northern Quahog
Mercenaria mercenaria
321 observations
Blue Mussel
Mytilus edulis
224 observations
Atlantic Bay Scallop
Argopecten irradians
211 observations
Channeled Whelk
Busycotypus canaliculatus
200 observations
Eastern Oyster
Crassostrea virginica
164 observations
Eastern Oyster Drill
Urosalpinx cinerea
162 observations
West Atlantic Surfclam
Spisula solidissima
161 observations
Common Jingle
Anomia simplex
160 observations
Eastern Mudsnail
Ilyanassa obsoleta
127 observations
Leopard Slug
Limax maximus
119 observations
Knobbed Whelk
Busycon carica
114 observations
Soft-shelled Clam
Mya arenaria
74 observations
Shark Eye
Neverita duplicata
73 observations
Threeline Mudsnail
Ilyanassa trivittata
72 observations
Changeable Mantleslug
Megapallifera mutabilis
65 observations
Northern Lacuna
Lacuna vincta
61 observations
Atlantic Jackknife
Ensis leei
61 observations
Flat Periwinkle
Littorina obtusata
55 observations
Common Whelk
Buccinum undatum
52 observations
Blood Ark
Lunarca ovalis
52 observations
Transverse Ark
Anadara transversa
47 observations
Naked Sea Butterfly
Clione limacina
46 observations
Well-ribbed Dove Snail
Costoanachis translirata
39 observations
Longfin Inshore Squid
Doryteuthis pealeii
37 observations
Rough Periwinkle
Littorina saxatilis
36 observations
Eastern Elliptio
Elliptio complanata
35 observations
Northern Moonsnail
Euspira heros
35 observations
Western Dusky Slug
Arion subfuscus
34 observations
Stout Tagelus
Tagelus plebeius
34 observations
Atlantic Dogwhelk
Nucella lapillus
34 observations
False Angelwing
Petricolaria pholadiformis
33 observations
Rounded Snail
Gonyodiscus rotundatus
31 observations
Chinese Mystery Snail
Margarya chinensis
29 observations
Asian Clam
Corbicula fluminea
28 observations
Eastern Whitelip
Neohelix albolabris
26 observations
Lunate Dove Shell
Astyris lunata
25 observations
Meadow Slug
Deroceras laeve
24 observations
Cross-hatched Lucine
Divalinga quadrisulcata
22 observations
Spotted Moonsnail
Euspira triseriata
21 observations
Chestnut Clam
Isocrassina castanea
21 observations
Northern Horse Mussel
Modiolus modiolus
20 observations
Milky Slug
Deroceras reticulatum
20 observations
Thick-lipped Drill
Eupleura caudata
20 observations
Morton's Cockle
Laevicardium mortoni
19 observations
Common Tortoiseshell Limpet
Testudinalia testudinalis
19 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)
- Eastern Oyster (Crassostrea virginica)
- Eastern Oyster Drill (Urosalpinx cinerea)
- The most observed mollusc in Rhode Island is Common Periwinkle (Littorina littorea), with 552 recorded observations.