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Common Periwinkle
Littorina littorea
368 observations
Eastern Elliptio
Elliptio complanata
232 observations
Winding Mantleslug
Philomycus flexuolaris
113 observations
Chinese Mystery Snail
Margarya chinensis
109 observations
Atlantic Dogwhelk
Nucella lapillus
108 observations
Blue Mussel
Mytilus edulis
98 observations
Tortoiseshell Limpet
Testudinalia testudinalis
75 observations
West Atlantic Surfclam
Spisula solidissima
74 observations
Common Atlantic Slippersnail
Crepidula fornicata
73 observations
Flat Periwinkle
Littorina obtusata
68 observations
Eastern Whitelip
Neohelix albolabris
66 observations
Western Dusky Slug
Arion subfuscus
54 observations
Atlantic Ribbed Mussel
Geukensia demissa
46 observations
Rough Periwinkle
Littorina saxatilis
41 observations
Soft-shelled Clam
Mya arenaria
40 observations
Eastern Oyster
Crassostrea virginica
39 observations
Northern Moonsnail
Euspira heros
39 observations
Atlantic Jackknife
Ensis leei
36 observations
Triangle Floater
Alasmidonta undulata
35 observations
Changeable Mantleslug
Megapallifera mutabilis
34 observations
Eastern Floater
Pyganodon cataracta
33 observations
Northern Horse Mussel
Modiolus modiolus
28 observations
Leopard Slug
Limax maximus
25 observations
Invasive
Sea Lemon
Archidoris pseudoargus
25 observations
European Flat Oyster
Ostrea edulis
20 observations
Milky Slug
Deroceras reticulatum
20 observations
Northern Quahog
Mercenaria mercenaria
18 observations
Longfin Inshore Squid
Doryteuthis pealeii
18 observations
barnacle-eating dorid
Onchidoris bilamellata
16 observations
Bushy-backed Nudibranch
Dendronotus frondosus
16 observations
Eastern Mudsnail
Ilyanassa obsoleta
15 observations
Common Whelk
Buccinum undatum
15 observations
Pointed Campeloma
Campeloma decisum
15 observations
Meadow Slug
Deroceras laeve
14 observations
Red-fingered Coryphella
Coryphella verrucosa
14 observations
Eastern Oyster Drill
Urosalpinx cinerea
11 observations
Rounded Snail
Gonyodiscus rotundatus
11 observations
Bellmouth Ramshorn
Planorbella campanulata
10 observations
Oval Ambersnail
Novisuccinea ovalis
10 observations
Threeline Mudsnail
Ilyanassa trivittata
8 observations
Eastern Lampmussel
Lampsilis radiata
8 observations
Toga Mantleslug
Philomycus togatus
8 observations
Glossy Pillar
Cochlicopa lubrica
7 observations
Eastern White Slippersnail
Crepidula plana
6 observations
Marsh Ramshorn
Planorbella trivolvis
6 observations
Common Pandora Clam
Pandora gouldiana
6 observations
Banded Mystery Snail
Callinina georgiana
6 observations
Hairy Spiny Dorid
Acanthodoris pilosa
5 observations
Brown-lipped Snail
Cepaea nemoralis
5 observations
Asian Clam
Corbicula fluminea
5 observations
Frequently Asked Questions
- The 10 most common molluscs in New Hampshire are:
- Common Periwinkle (Littorina littorea)
- Eastern Elliptio (Elliptio complanata)
- Winding Mantleslug (Philomycus flexuolaris)
- Chinese Mystery Snail (Margarya chinensis)
- Atlantic Dogwhelk (Nucella lapillus)
- Blue Mussel (Mytilus edulis)
- Tortoiseshell Limpet (Testudinalia testudinalis)
- West Atlantic Surfclam (Spisula solidissima)
- Common Atlantic Slippersnail (Crepidula fornicata)
- Flat Periwinkle (Littorina obtusata)
- The most observed mollusc in New Hampshire is Common Periwinkle (Littorina littorea), with 368 recorded observations.
- Some of the most commonly observed invasive molluscs in New Hampshire include:
- Sea Lemon (Archidoris pseudoargus)