Chinaman's Hat, Chinese hat
- Peak month
- May
- Records since 2000
- 473
- Scientific name
- Calyptraea chinensis
Marsh Whorl Snail
- Peak month
- October
- Records since 2000
- 463
- Scientific name
- Vertigo antivertigo
Diodora graeca
- Peak month
- August
- Records since 2000
- 455
- Group
- Molluscs
Abra tenuis
- Peak month
- September
- Records since 2000
- 447
- Group
- Molluscs
Malacolimax tenellus
- Peak month
- November
- Records since 2000
- 446
- Group
- Molluscs
Euglesa subtruncata
- Peak month
- September
- Records since 2000
- 445
- Group
- Molluscs
Euconulus alderi
- Peak month
- September
- Records since 2000
- 442
- Group
- Molluscs
Tragula fenestrata
- Peak month
- March
- Records since 2000
- 441
- Group
- Molluscs
Theba pisana
- Peak month
- August
- Records since 2000
- 440
- Group
- Molluscs
Moss bladder snail
- Peak month
- April
- Records since 2000
- 437
- Scientific name
- Aplexa hypnorum
Euglesa casertana
- Peak month
- December
- Records since 2000
- 433
- Group
- Molluscs
Arion vulgaris
- Peak month
- September
- Records since 2000
- 425
- Group
- Molluscs
Ena montana
- Peak month
- May
- Records since 2000
- 424
- Group
- Molluscs
Neomenia carinata
- Peak month
- August
- Records since 2000
- 424
- Group
- Molluscs
Goniodoris nodosa
- Peak month
- July
- Records since 2000
- 420
- Group
- Molluscs
Rissoa membranacea
- Peak month
- July
- Records since 2000
- 405
- Group
- Molluscs
Lutraria lutraria
- Peak month
- July
- Records since 2000
- 397
- Group
- Molluscs
Doto fragilis
- Peak month
- June
- Records since 2000
- 392
- Group
- Molluscs
Simnia patula
- Peak month
- July
- Records since 2000
- 390
- Group
- Molluscs
Fine-lined Pea Mussel
- Peak month
- May
- Records since 2000
- 387
- Scientific name
- Odhneripisidium tenuilineatum
Obtusella intersecta
- Peak month
- July
- Records since 2000
- 387
- Group
- Molluscs
Parvicardium exiguum
- Peak month
- May
- Records since 2000
- 384
- Group
- Molluscs
Ensis siliqua
- Peak month
- August
- Records since 2000
- 374
- Group
- Molluscs
Euspira montagui
- Peak month
- August
- Records since 2000
- 374
- Group
- Molluscs
Jorunna tomentosa
- Peak month
- August
- Records since 2000
- 371
- Group
- Molluscs
Bela nebula
- Peak month
- April
- Records since 2000
- 369
- Group
- Molluscs
Euglesa milium
- Peak month
- May
- Records since 2000
- 367
- Group
- Molluscs
Zonitoides excavatus
- Peak month
- May
- Records since 2000
- 365
- Group
- Molluscs
Barnea candida
- Peak month
- August
- Records since 2000
- 362
- Group
- Molluscs
Rocellaria dubia
- Peak month
- September
- Records since 2000
- 360
- Group
- Molluscs
Gari depressa
- Peak month
- July
- Records since 2000
- 345
- Group
- Molluscs
Illex illecebrosus
- Peak month
- November
- Records since 2000
- 341
- Group
- Molluscs
Black-footed limpet
- Peak month
- October
- Records since 2000
- 340
- Scientific name
- Patella depressa
Depressed river mussel
- Peak month
- September
- Records since 2000
- 338
- Scientific name
- Pseudanodonta complanata
Ruditapes philippinarum
- Peak month
- March
- Records since 2000
- 332
- Group
- Molluscs
Montacuta substriata
- Peak month
- May
- Records since 2000
- 330
- Group
- Molluscs
Elysia viridis
- Peak month
- September
- Records since 2000
- 327
- Group
- Molluscs
Alloteuthis media
- Peak month
- February
- Records since 2000
- 323
- Group
- Molluscs
Lepton squamosum
- Peak month
- August
- Records since 2000
- 322
- Group
- Molluscs
Pleurobranchus membranaceus
- Peak month
- March
- Records since 2000
- 322
- Group
- Molluscs
A marine mollusc
- Peak month
- June
- Records since 2000
- 320
- Scientific name
- Devonia perrieri
Thyasira obsoleta
- Peak month
- November
- Records since 2000
- 319
- Group
- Molluscs
Embletonia pulchra
- Peak month
- May
- Records since 2000
- 317
- Group
- Molluscs
Eulimella acicula
- Peak month
- May
- Records since 2000
- 315
- Group
- Molluscs
Skeneopsis planorbis
- Peak month
- March
- Records since 2000
- 315
- Group
- Molluscs
Doto pinnatifida
- Peak month
- June
- Records since 2000
- 309
- Group
- Molluscs
Pusillina sarsii
- Peak month
- May
- Records since 2000
- 307
- Group
- Molluscs
Vertigo substriata
- Peak month
- July
- Records since 2000
- 307
- Group
- Molluscs