Spiny cockle
- Peak month
- July
- Records since 2000
- 142
- Scientific name
- Acanthocardia aculeata
Ancula gibbosa
- Peak month
- June
- Records since 2000
- 139
- Group
- Molluscs
Capulus ungaricus
- Peak month
- August
- Records since 2000
- 139
- Group
- Molluscs
Gari costulata
- Peak month
- September
- Records since 2000
- 139
- Group
- Molluscs
Narrow-mouthed whorl snail
- Peak month
- September
- Records since 2000
- 139
- Scientific name
- Vertigo angustior
Parthenina decussata
- Peak month
- April
- Records since 2000
- 138
- Group
- Molluscs
Thyasira polygona
- Peak month
- May
- Records since 2000
- 138
- Group
- Molluscs
Scutopus ventrolineatus
- Peak month
- January
- Records since 2000
- 137
- Group
- Molluscs
Black-lined periwinkle
- Peak month
- August
- Records since 2000
- 136
- Scientific name
- Littorina compressa
Azorinus chamasolen
- Peak month
- June
- Records since 2000
- 130
- Group
- Molluscs
Brachystomia scalaris
- Peak month
- August
- Records since 2000
- 129
- Group
- Molluscs
Ensis directus
- Peak month
- May
- Records since 2000
- 129
- Group
- Molluscs
Macrogastra rolphii
- Peak month
- October
- Records since 2000
- 128
- Group
- Molluscs
Pseudamussium peslutrae
- Peak month
- September
- Records since 2000
- 128
- Group
- Molluscs
Mangelia coarctata
- Peak month
- March
- Records since 2000
- 127
- Group
- Molluscs
Geyer's whorl snail
- Peak month
- August
- Records since 2000
- 126
- Scientific name
- Vertigo geyeri
Boreotrophon truncatus
- Peak month
- September
- Records since 2000
- 125
- Group
- Molluscs
Euspira fusca
- Peak month
- August
- Records since 2000
- 125
- Group
- Molluscs
Venus verrucosa
- Peak month
- September
- Records since 2000
- 125
- Group
- Molluscs
Omalogyra atomus
- Peak month
- August
- Records since 2000
- 124
- Group
- Molluscs
Adalaria proxima
- Peak month
- July
- Records since 2000
- 123
- Group
- Molluscs
Eleutheromenia sierra
- Peak month
- February
- Records since 2000
- 122
- Group
- Molluscs
Rissoella opalina
- Peak month
- August
- Records since 2000
- 121
- Group
- Molluscs
Glutinous Snail
- Peak month
- October
- Records since 2000
- 120
- Scientific name
- Myxas glutinosa
Cuspidaria cuspidata
- Peak month
- May
- Records since 2000
- 118
- Group
- Molluscs
Roxania utriculus
- Peak month
- August
- Records since 2000
- 117
- Group
- Molluscs
Balea heydeni
- Peak month
- March
- Records since 2000
- 116
- Group
- Molluscs
Skenea serpuloides
- Peak month
- August
- Records since 2000
- 116
- Group
- Molluscs
Similipecten similis
- Peak month
- August
- Records since 2000
- 114
- Group
- Molluscs
Ruditapes decussatus
- Peak month
- September
- Records since 2000
- 113
- Group
- Molluscs
Geitodoris planata
- Peak month
- June
- Records since 2000
- 111
- Group
- Molluscs
Rostanga rubra
- Peak month
- June
- Records since 2000
- 111
- Group
- Molluscs
Akera bullata
- Peak month
- June
- Records since 2000
- 110
- Group
- Molluscs
Lamellaria latens
- Peak month
- August
- Records since 2000
- 110
- Group
- Molluscs
Ensis leei
- Peak month
- April
- Records since 2000
- 108
- Group
- Molluscs
Rissoa lilacina
- Peak month
- May
- Records since 2000
- 108
- Group
- Molluscs
Astarte elliptica
- Peak month
- October
- Records since 2000
- 107
- Group
- Molluscs
Beringius turtoni
- Peak month
- September
- Records since 2000
- 107
- Group
- Molluscs
Lesser Ramshorn Snail
- Peak month
- May
- Records since 2000
- 107
- Scientific name
- Anisus vorticulus
Mangelia attenuata
- Peak month
- July
- Records since 2000
- 107
- Group
- Molluscs
Calliostoma granulatum
- Peak month
- August
- Records since 2000
- 106
- Group
- Molluscs
Barnea parva
- Peak month
- March
- Records since 2000
- 105
- Group
- Molluscs
A marine snail
- Peak month
- June
- Records since 2000
- 104
- Scientific name
- Ceratia proxima
Cingula trifasciata
- Peak month
- September
- Records since 2000
- 104
- Group
- Molluscs
Deroceras panormitanum
- Peak month
- May
- Records since 2000
- 103
- Group
- Molluscs
Antalis vulgaris
- Peak month
- August
- Records since 2000
- 102
- Group
- Molluscs
Phenacolimax major
- Peak month
- April
- Records since 2000
- 102
- Group
- Molluscs
Testacella maugei
- Peak month
- October
- Records since 2000
- 102
- Group
- Molluscs