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Common Periwinkle
Littorina littorea
3,767 observations
Atlantic Dogwhelk
Nucella lapillus
1,352 observations
Blue Mussel
Mytilus edulis
852 observations
Common Tortoiseshell Limpet
Testudinalia testudinalis
817 observations
Bushy-backed Nudibranch
Dendronotus frondosus
744 observations
Common Atlantic Slippersnail
Crepidula fornicata
736 observations
West Atlantic Surfclam
Spisula solidissima
680 observations
Flat Periwinkle
Littorina obtusata
667 observations
Red-fingered Coryphella
Coryphella verrucosa
657 observations
Northern Horse Mussel
Modiolus modiolus
510 observations
Leopard Slug
Limax maximus
501 observations
Soft-shelled Clam
Mya arenaria
486 observations
Atlantic Jackknife
Ensis leei
479 observations
barnacle-eating dorid
Onchidoris bilamellata
450 observations
Eastern Elliptio
Elliptio complanata
385 observations
Rim-backed Nudibranch
Palio dubia
306 observations
Shag-rug Nudibranch
Aeolidia papillosa
297 observations
Northern Moonsnail
Euspira heros
286 observations
Fuzzy Onchidoris
Onchidoris muricata
276 observations
Common Whelk
Buccinum undatum
259 observations
Northern Quahog
Mercenaria mercenaria
253 observations
Rough Periwinkle
Littorina saxatilis
250 observations
Crowned Seaslug
Doto coronata
218 observations
Eastern Oyster
Crassostrea virginica
182 observations
European Flat Oyster
Ostrea edulis
142 observations
Rocky Aeolid
Eubranchulus rupium
131 observations
Threeline Mudsnail
Ilyanassa trivittata
122 observations
Western Dusky Slug
Arion subfuscus
112 observations
Northern Lacuna
Lacuna vincta
111 observations
Brown-lipped Snail
Cepaea nemoralis
107 observations
Chinese Mystery Snail
Margarya chinensis
106 observations
Humped Ancula Sea Slug
Ancula gibbosa
104 observations
Green Aeolis
Diaphoreolis viridis
103 observations
Longfin Inshore Squid
Doryteuthis pealeii
94 observations
Eastern Whitelip
Neohelix albolabris
91 observations
Atlantic deep-sea scallop
Placopecten magellanicus
91 observations
Branched Sapsucker
Placida dendritica
89 observations
Slender Eolis
Coryphella gracilis
89 observations
Tree slug
Lehmannia marginata
85 observations
Atlantic Razor
Siliqua costata
82 observations
Johnston's balloon eolis
Tergipes tergipes
78 observations
Hairy Spiny Dorid
Acanthodoris pilosa
74 observations
White-lipped Snail
Cepaea hortensis
69 observations
Eastern Floater
Pyganodon cataracta
68 observations
False Angelwing
Petricolaria pholadiformis
62 observations
club-gilled nudibranch
Amphorina pallida
60 observations
Eastern White Slippersnail
Crepidula plana
59 observations
Arctic Hiatella
Hiatella arctica
58 observations
Pearly Topshell
Margarites helicinus
57 observations
Sea Lemon
Archidoris pseudoargus
54 observations
Frequently Asked Questions
- The 10 most common molluscs in Maine are:
- Common Periwinkle (Littorina littorea)
- Atlantic Dogwhelk (Nucella lapillus)
- Blue Mussel (Mytilus edulis)
- Common Tortoiseshell Limpet (Testudinalia testudinalis)
- Bushy-backed Nudibranch (Dendronotus frondosus)
- Common Atlantic Slippersnail (Crepidula fornicata)
- West Atlantic Surfclam (Spisula solidissima)
- Flat Periwinkle (Littorina obtusata)
- Red-fingered Coryphella (Coryphella verrucosa)
- Northern Horse Mussel (Modiolus modiolus)
- The most observed mollusc in Maine is Common Periwinkle (Littorina littorea), with 3,767 recorded observations.