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Common Periwinkle
Littorina littorea
422 observations
Eastern Elliptio
Elliptio complanata
241 observations
Atlantic Dogwhelk
Nucella lapillus
125 observations
Winding Mantleslug
Philomycus flexuolaris
119 observations
Chinese Mystery Snail
Margarya chinensis
110 observations
Blue Mussel
Mytilus edulis
101 observations
Flat Periwinkle
Littorina obtusata
87 observations
Common Atlantic Slippersnail
Crepidula fornicata
82 observations
West Atlantic Surfclam
Spisula solidissima
82 observations
Common Tortoiseshell Limpet
Testudinalia testudinalis
82 observations
Eastern Whitelip
Neohelix albolabris
69 observations
Western Dusky Slug
Arion subfuscus
56 observations
Soft-shelled Clam
Mya arenaria
50 observations
Invasive
Sea Lemon
Archidoris pseudoargus
50 observations
Atlantic Ribbed Mussel
Geukensia demissa
49 observations
Northern Moonsnail
Euspira heros
44 observations
Rough Periwinkle
Littorina saxatilis
42 observations
Atlantic Jackknife
Ensis leei
42 observations
Eastern Oyster
Crassostrea virginica
39 observations
Triangle Floater
Alasmidonta undulata
35 observations
Changeable Mantleslug
Megapallifera mutabilis
35 observations
Eastern Floater
Pyganodon cataracta
35 observations
Northern Horse Mussel
Modiolus modiolus
31 observations
Leopard Slug
Limax maximus
29 observations
Northern Quahog
Mercenaria mercenaria
25 observations
Longfin Inshore Squid
Doryteuthis pealeii
22 observations
European Flat Oyster
Ostrea edulis
21 observations
Milky Slug
Deroceras reticulatum
20 observations
Eastern Mudsnail
Ilyanassa obsoleta
17 observations
Common Whelk
Buccinum undatum
17 observations
barnacle-eating dorid
Onchidoris bilamellata
16 observations
Bushy-backed Nudibranch
Dendronotus frondosus
16 observations
Meadow Slug
Deroceras laeve
15 observations
Pointed Campeloma
Campeloma decisum
15 observations
Red-fingered Coryphella
Coryphella verrucosa
15 observations
Rounded Snail
Gonyodiscus rotundatus
13 observations
Eastern Oyster Drill
Urosalpinx cinerea
11 observations
Bellmouth Ramshorn
Planorbella campanulata
10 observations
Threeline Mudsnail
Ilyanassa trivittata
9 observations
Eastern Lampmussel
Lampsilis radiata
9 observations
Toga Mantleslug
Philomycus togatus
9 observations
Asian Clam
Corbicula fluminea
7 observations
Eastern White Slippersnail
Crepidula plana
7 observations
Glossy Pillar
Cochlicopa lubrica
7 observations
Banded Mystery Snail
Callinina georgiana
7 observations
Marsh Ramshorn
Planorbella trivolvis
6 observations
Common Pandora Clam
Pandora gouldiana
6 observations
Hairy Spiny Dorid
Acanthodoris pilosa
5 observations
Brown-lipped Snail
Cepaea nemoralis
5 observations
Eastern Emerald Elysia
Elysia chlorotica
5 observations
Frequently Asked Questions
- The 10 most common molluscs in New Hampshire are:
- Common Periwinkle (Littorina littorea)
- Eastern Elliptio (Elliptio complanata)
- Atlantic Dogwhelk (Nucella lapillus)
- Winding Mantleslug (Philomycus flexuolaris)
- Chinese Mystery Snail (Margarya chinensis)
- Blue Mussel (Mytilus edulis)
- Flat Periwinkle (Littorina obtusata)
- Common Atlantic Slippersnail (Crepidula fornicata)
- West Atlantic Surfclam (Spisula solidissima)
- Common Tortoiseshell Limpet (Testudinalia testudinalis)
- The most observed mollusc in New Hampshire is Common Periwinkle (Littorina littorea), with 422 recorded observations.
- Some of the most commonly observed invasive molluscs in New Hampshire include:
- Sea Lemon (Archidoris pseudoargus)