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Common Periwinkle
Littorina littorea
3,619 observations
Atlantic Dogwhelk
Nucella lapillus
1,323 observations
Blue Mussel
Mytilus edulis
841 observations
Tortoiseshell Limpet
Testudinalia testudinalis
789 observations
Bushy-backed Nudibranch
Dendronotus frondosus
735 observations
Common Atlantic Slippersnail
Crepidula fornicata
698 observations
West Atlantic Surfclam
Spisula solidissima
668 observations
Flat Periwinkle
Littorina obtusata
642 observations
Red-fingered Coryphella
Coryphella verrucosa
617 observations
Northern Horse Mussel
Modiolus modiolus
500 observations
Leopard Slug
Limax maximus
478 observations
Soft-shelled Clam
Mya arenaria
470 observations
Atlantic Jackknife
Ensis leei
466 observations
barnacle-eating dorid
Onchidoris bilamellata
444 observations
Eastern Elliptio
Elliptio complanata
381 observations
Rim-backed Nudibranch
Palio dubia
301 observations
Shag-rug Nudibranch
Aeolidia papillosa
276 observations
Northern Moonsnail
Euspira heros
265 observations
Fuzzy Onchidoris
Onchidoris muricata
263 observations
Common Whelk
Buccinum undatum
253 observations
Northern Quahog
Mercenaria mercenaria
246 observations
Rough Periwinkle
Littorina saxatilis
239 observations
Crowned Seaslug
Doto coronata
210 observations
Eastern Oyster
Crassostrea virginica
178 observations
European Flat Oyster
Ostrea edulis
139 observations
Rocky Aeolid
Eubranchulus rupium
129 observations
Threeline Mudsnail
Ilyanassa trivittata
120 observations
Western Dusky Slug
Arion subfuscus
110 observations
Northern Lacuna
Lacuna vincta
106 observations
Humped Ancula Sea Slug
Ancula gibbosa
104 observations
Green Aeolis
Diaphoreolis viridis
103 observations
Brown-lipped Snail
Cepaea nemoralis
102 observations
Chinese Mystery Snail
Margarya chinensis
102 observations
Longfin Inshore Squid
Doryteuthis pealeii
94 observations
Eastern Whitelip
Neohelix albolabris
91 observations
Branched Sapsucker
Placida dendritica
89 observations
Atlantic deep-sea scallop
Placopecten magellanicus
89 observations
Slender Eolis
Coryphella gracilis
89 observations
Atlantic Razor
Siliqua costata
82 observations
Tree slug
Lehmannia marginata
81 observations
Hairy Spiny Dorid
Acanthodoris pilosa
74 observations
Eastern Floater
Pyganodon cataracta
65 observations
White-lipped Snail
Cepaea hortensis
63 observations
Johnston's balloon eolis
Tergipes tergipes
63 observations
False Angelwing
Petricolaria pholadiformis
60 observations
club-gilled nudibranch
Amphorina pallida
58 observations
Eastern White Slippersnail
Crepidula plana
55 observations
Arctic Hiatella
Hiatella arctica
53 observations
Pearly Topshell
Margarites helicinus
53 observations
Sea Lemon
Archidoris pseudoargus
48 observations
Frequently Asked Questions
- The 10 most common molluscs in Maine are:
- Common Periwinkle (Littorina littorea)
- Atlantic Dogwhelk (Nucella lapillus)
- Blue Mussel (Mytilus edulis)
- 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 3,619 recorded observations.