Melanella alba
- Peak month
- August
- Records since 2000
- 210
- Group
- Molluscs
Stagnicola fuscus
- Peak month
- December
- Records since 2000
- 207
- Group
- Molluscs
Common Bobtail
- Peak month
- February
- Records since 2000
- 204
- Scientific name
- Sepietta oweniana
Cecilioides acicula
- Peak month
- May
- Records since 2000
- 202
- Group
- Molluscs
Odostomia unidentata
- Peak month
- May
- Records since 2000
- 202
- Group
- Molluscs
Pyrgiscus crenatus
- Peak month
- July
- Records since 2000
- 202
- Group
- Molluscs
Spiralina spiralis
- Peak month
- July
- Records since 2000
- 201
- Group
- Molluscs
Berthella plumula
- Peak month
- April
- Records since 2000
- 198
- Group
- Molluscs
Tornus subcarinatus
- Peak month
- June
- Records since 2000
- 198
- Group
- Molluscs
Beautiful grass snail
- Peak month
- September
- Records since 2000
- 197
- Scientific name
- Vallonia pulchella
Painter's Mussel
- Peak month
- July
- Records since 2000
- 197
- Scientific name
- Unio pictorum
Listers river snail
- Peak month
- May
- Records since 2000
- 192
- Scientific name
- Viviparus contectus
Mangelia costata
- Peak month
- September
- Records since 2000
- 191
- Group
- Molluscs
Balea perversa
- Peak month
- May
- Records since 2000
- 183
- Group
- Molluscs
Thick lacuna
- Peak month
- June
- Records since 2000
- 181
- Scientific name
- Lacuna crassior
Saxicavella jeffreysi
- Peak month
- March
- Records since 2000
- 180
- Group
- Molluscs
A marine gastropod
- Peak month
- May
- Records since 2000
- 179
- Scientific name
- Manzonia crassa
Doto coronata
- Peak month
- June
- Records since 2000
- 179
- Group
- Molluscs
Henslow's Pea Mussel
- Peak month
- December
- Records since 2000
- 177
- Scientific name
- Euglesa henslowana
Talochlamys pusio
- Peak month
- August
- Records since 2000
- 174
- Group
- Molluscs
Lasaea adansoni
- Peak month
- September
- Records since 2000
- 173
- Group
- Molluscs
Thecacera pennigera
- Peak month
- June
- Records since 2000
- 173
- Group
- Molluscs
Yoldiella philippiana
- Peak month
- September
- Records since 2000
- 172
- Group
- Molluscs
Odostomia plicata
- Peak month
- May
- Records since 2000
- 170
- Group
- Molluscs
A chiton
- Peak month
- October
- Records since 2000
- 166
- Scientific name
- Tonicella marmorea
Hanleya hanleyi
- Peak month
- May
- Records since 2000
- 165
- Group
- Molluscs
Plaited snail
- Peak month
- May
- Records since 2000
- 162
- Scientific name
- Spermodea lamellata
Stagnicola palustris
- Peak month
- July
- Records since 2000
- 162
- Group
- Molluscs
Epitonium clathratulum
- Peak month
- June
- Records since 2000
- 161
- Group
- Molluscs
Favorinus branchialis
- Peak month
- June
- Records since 2000
- 160
- Group
- Molluscs
Abida secale
- Peak month
- May
- Records since 2000
- 159
- Group
- Molluscs
Epitonium trevelyanum
- Peak month
- August
- Records since 2000
- 159
- Group
- Molluscs
Pronucula tenuis
- Peak month
- February
- Records since 2000
- 159
- Group
- Molluscs
Velutina velutina
- Peak month
- July
- Records since 2000
- 158
- Group
- Molluscs
Pandora pinna
- Peak month
- April
- Records since 2000
- 155
- Group
- Molluscs
Turtonia minuta
- Peak month
- August
- Records since 2000
- 155
- Group
- Molluscs
Rissoella diaphana
- Peak month
- August
- Records since 2000
- 154
- Group
- Molluscs
Margarites helicinus
- Peak month
- August
- Records since 2000
- 153
- Group
- Molluscs
Clione limacina
- Peak month
- September
- Records since 2000
- 149
- Group
- Molluscs
Dikoleps nitens
- Peak month
- April
- Records since 2000
- 149
- Group
- Molluscs
Fan mussel
- Peak month
- May
- Records since 2000
- 149
- Scientific name
- Atrina fragilis
Point snail
- Peak month
- May
- Records since 2000
- 149
- Scientific name
- Acicula fusca
A sea slug
- Peak month
- June
- Records since 2000
- 148
- Scientific name
- Facelina annulicornis
Thracia pubescens
- Peak month
- August
- Records since 2000
- 148
- Group
- Molluscs
Quagga Mussel
- Peak month
- October
- Records since 2000
- 145
- Scientific name
- Dreissena bugensis
Aporrhais serresiana
- Peak month
- August
- Records since 2000
- 144
- Group
- Molluscs
Epitonium clathrus
- Peak month
- June
- Records since 2000
- 143
- Group
- Molluscs
Yellow skirt slug
- Peak month
- June
- Records since 2000
- 143
- Scientific name
- Okenia elegans