Venus casina
- Peak month
- July
- Records since 2000
- 1,003
- Group
- Molluscs
Flame Shell
- Peak month
- September
- Records since 2000
- 994
- Scientific name
- Limaria hians
Worm Slug
- Peak month
- May
- Records since 2000
- 985
- Scientific name
- Boettgerilla pallens
Banded Wedge-shell
- Peak month
- June
- Records since 2000
- 973
- Scientific name
- Donax vittatus
Montagu's Topshell
- Peak month
- August
- Records since 2000
- 954
- Scientific name
- Jujubinus montagui
Arctic Barrel-Bubble
- Peak month
- May
- Records since 2000
- 947
- Scientific name
- Retusa obtusa
Pink slit limpet
- Peak month
- August
- Records since 2000
- 947
- Scientific name
- Emarginula rosea
Common Whorl Snail
- Peak month
- September
- Records since 2000
- 932
- Scientific name
- Vertigo pygmaea
Little Venus
- Peak month
- April
- Records since 2000
- 932
- Scientific name
- Gouldia minima
Cross-Sculpture Crenella
- Peak month
- September
- Records since 2000
- 928
- Scientific name
- Crenella decussata
Prickly Jingle
- Peak month
- August
- Records since 2000
- 923
- Scientific name
- Heteranomia squamula
Elegant Cuttlefish
- Peak month
- March
- Records since 2000
- 916
- Scientific name
- Rhombosepion elegans
Retusa umbilicata
- Peak month
- May
- Records since 2000
- 910
- Group
- Molluscs
Fried egg nudibranch
- Peak month
- June
- Records since 2000
- 894
- Scientific name
- Diaphorodoris luteocincta
Arctic Paperbubble
- Peak month
- June
- Records since 2000
- 875
- Scientific name
- Diaphana minuta
Duvaucelia odhneri
- Peak month
- July
- Records since 2000
- 865
- Group
- Molluscs
Darparnaud's Glass Snail
- Peak month
- April
- Records since 2000
- 843
- Scientific name
- Oxychilus draparnaudi
Rock snail
- Peak month
- May
- Records since 2000
- 842
- Scientific name
- Pyramidula pusilla
Atlantic Surf Clam
- Peak month
- June
- Records since 2000
- 840
- Scientific name
- Spisula solida
Shiny Glass Snail
- Peak month
- August
- Records since 2000
- 839
- Scientific name
- Zonitoides nitidus
Hemilepton nitidum
- Peak month
- August
- Records since 2000
- 825
- Group
- Molluscs
Small Periwinkle, Lagoon Snail
- Peak month
- September
- Records since 2000
- 820
- Scientific name
- Melarhaphe neritoides
White-lipped Ramshorn
- Peak month
- May
- Records since 2000
- 818
- Scientific name
- Anisus leucostoma
Tritonia hombergii
- Peak month
- September
- Records since 2000
- 803
- Group
- Molluscs
Brown Snail
- Peak month
- September
- Records since 2000
- 800
- Scientific name
- Zenobiellina subrufescens
Axinulus croulinensis
- Peak month
- October
- Records since 2000
- 792
- Group
- Molluscs
Silky Snail
- Peak month
- September
- Records since 2000
- 786
- Scientific name
- Ashfordia granulata
European flying squid
- Peak month
- September
- Records since 2000
- 785
- Scientific name
- Todarodes sagittatus
Equal Cleftclam
- Peak month
- October
- Records since 2000
- 778
- Scientific name
- Parathyasira equalis
Striate Lyonsia
- Peak month
- August
- Records since 2000
- 776
- Scientific name
- Lyonsia norwegica
Star Gyro
- Peak month
- May
- Records since 2000
- 772
- Scientific name
- Armiger crista
Truncate barrel-bubble
- Peak month
- May
- Records since 2000
- 766
- Scientific name
- Retusa truncatula
Arched Razor Shell
- Peak month
- July
- Records since 2000
- 763
- Scientific name
- Ensis magnus
Minute Nutclam
- Peak month
- May
- Records since 2000
- 759
- Scientific name
- Nuculana minuta
Pheasant Shell
- Peak month
- September
- Records since 2000
- 743
- Scientific name
- Tricolia pullus
Asian clam, Prosperity clam, Asiatic clam, Golden Freshwater Clam
- Peak month
- December
- Records since 2000
- 742
- Scientific name
- Corbicula fluminea
Common Valve Snail
- Peak month
- June
- Records since 2000
- 735
- Scientific name
- Valvata piscinalis
Norway cockle
- Peak month
- August
- Records since 2000
- 732
- Scientific name
- Laevicardium crassum
Flat periwinkle
- Peak month
- August
- Records since 2000
- 728
- Scientific name
- Littorina fabalis
Great top shell
- Peak month
- September
- Records since 2000
- 728
- Scientific name
- Gibbula magus
Stout Bobtail
- Peak month
- August
- Records since 2000
- 728
- Scientific name
- Rossia macrosoma
Bean Horse-mussel
- Peak month
- March
- Records since 2000
- 727
- Scientific name
- Modiolula phaseolina
Green Crenella
- Peak month
- August
- Records since 2000
- 709
- Scientific name
- Musculus discors
Yellow Slug
- Peak month
- September
- Records since 2000
- 705
- Scientific name
- Limacus flavus
Cochlicopa lubricella
- Peak month
- June
- Records since 2000
- 704
- Group
- Molluscs
Eccentric Grass Snail
- Peak month
- May
- Records since 2000
- 703
- Scientific name
- Vallonia excentrica
Ash-black Slug
- Peak month
- May
- Records since 2000
- 699
- Scientific name
- Limax cinereoniger
Necklace Shell
- Peak month
- June
- Records since 2000
- 683
- Scientific name
- Euspira catena