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Knobbed Whelk
Busycon carica
593 observations
Leopard Slug
Limax maximus
559 observations
Common Atlantic Slippersnail
Crepidula fornicata
338 observations
Eastern Oyster
Crassostrea virginica
315 observations
Atlantic Ribbed Mussel
Geukensia demissa
218 observations
Eastern Mudsnail
Ilyanassa obsoleta
213 observations
Blood Ark
Lunarca ovalis
203 observations
Stout Tagelus
Tagelus plebeius
188 observations
Atlantic Jackknife
Ensis leei
169 observations
Northern Quahog
Mercenaria mercenaria
164 observations
Atlantic Bay Scallop
Argopecten irradians
163 observations
Shark Eye
Neverita duplicata
127 observations
Channeled Whelk
Busycotypus canaliculatus
119 observations
Blue Mussel
Mytilus edulis
112 observations
Common Jingle
Anomia simplex
111 observations
Naked Sea Butterfly
Clione limacina
97 observations
Changeable Mantleslug
Megapallifera mutabilis
81 observations
Asian Clam
Corbicula fluminea
76 observations
West Atlantic Surfclam
Spisula solidissima
75 observations
Angelwing
Cyrtopleura costata
58 observations
Marsh Periwinkle
Littoraria irrorata
53 observations
Threeline Mudsnail
Ilyanassa trivittata
53 observations
Milky Slug
Deroceras reticulatum
36 observations
Eastern Elliptio
Elliptio complanata
36 observations
Transverse Ark
Anadara transversa
36 observations
False Angelwing
Petricolaria pholadiformis
36 observations
Eastern Oyster Drill
Urosalpinx cinerea
33 observations
Carolina Mantleslug
Philomycus carolinianus
32 observations
Chestnut Clam
Isocrassina castanea
22 observations
Thick-lipped Drill
Eupleura caudata
21 observations
Two-toothed Marsh Snail
Melampus bidentatus
19 observations
Eastern Floater
Pyganodon cataracta
17 observations
Atlantic Rangia
Rangia cuneata
17 observations
Globose Dome Snail
Ventridens ligera
17 observations
Eastern White Slippersnail
Crepidula plana
16 observations
Eastern Whitelip
Neohelix albolabris
12 observations
Northern Lance
Elliptio fisheriana
11 observations
Fossor Coquina
Donax fossor
11 observations
Chinese Mystery Snail
Margarya chinensis
11 observations
Rounded Snail
Gonyodiscus rotundatus
10 observations
Meadow Slug
Deroceras laeve
9 observations
Brown-lipped Snail
Cepaea nemoralis
8 observations
Carthusian Nun Snail
Monacha cartusiana
8 observations
Atlantic brief squid
Lolliguncula brevis
8 observations
Atlantic Macoma
Macoma petalum
8 observations
Three-tooth Carditid
Pleuromeris tridentata
8 observations
Soft-shelled Clam
Mya arenaria
7 observations
Western Dusky Slug
Arion subfuscus
6 observations
Green Jackknife Clam
Solen viridis
6 observations
White-lip Globe Snail
Mesodon thyroidus
5 observations
Frequently Asked Questions
- The 10 most common molluscs in Delaware are:
- Knobbed Whelk (Busycon carica)
- Leopard Slug (Limax maximus)
- Common Atlantic Slippersnail (Crepidula fornicata)
- Eastern Oyster (Crassostrea virginica)
- Atlantic Ribbed Mussel (Geukensia demissa)
- Eastern Mudsnail (Ilyanassa obsoleta)
- Blood Ark (Lunarca ovalis)
- Stout Tagelus (Tagelus plebeius)
- Atlantic Jackknife (Ensis leei)
- Northern Quahog (Mercenaria mercenaria)
- The most observed mollusc in Delaware is Knobbed Whelk (Busycon carica), with 593 recorded observations.