Harpinia pectinata
- Group
- Crustaceans
- Peak month
- June
- Records since 2000
- 1,577
Described in 1891
29 species
Sealoch anemone
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 1,386
Gammaropsis palmata
- Group
- Crustaceans
- Peak month
- March
- Records since 2000
- 1,139
Tmetonyx similis
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 664
Solitary maple leaf gall mite
- Group
- Mites, harvestmen and other arachnids
- Peak month
- September
- Records since 2000
- 549
Orange lights seasquirt
- Group
- Sea squirts
- Peak month
- June
- Records since 2000
- 527
Walnut Blister Mite
- Group
- Mites, harvestmen and other arachnids
- Peak month
- August
- Records since 2000
- 477
Microjassa cumbrensis
- Group
- Crustaceans
- Peak month
- July
- Records since 2000
- 433
Archidistoma aggregatum
- Group
- Sea squirts
- Peak month
- June
- Records since 2000
- 310
Tanaissus lilljeborgi
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 275
Cecidophyes nudus
- Group
- Mites, harvestmen and other arachnids
- Peak month
- September
- Records since 2000
- 255
Harpinia laevis
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 252
Bathyporeia gracilis
- Group
- Crustaceans
- Peak month
- February
- Records since 2000
- 246
Frustulia rhomboides
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 242
Ligurian Leafhopper
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 240
Aceria nervisequa
- Group
- Mites, harvestmen and other arachnids
- Peak month
- June
- Records since 2000
- 197
Acalitus stenaspis
- Group
- Mites, harvestmen and other arachnids
- Peak month
- June
- Records since 2000
- 121
Frustulia vulgaris
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 100
Allajulus nitidus
- Group
- Millipedes
- Peak month
- August
- Records since 2000
- 87
Zoothamnium pelagicum
- Group
- Microorganisms and protists
- Peak month
- October
- Records since 2000
- 85
Eriocrania sangii
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 83
Vertebrata fruticulosa
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 79
Vertebrata thuyoides
- Group
- Seaweeds and algae
- Peak month
- May
- Records since 2000
- 76
Colpognathus divisus
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 67
Trachys compressus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 62
Cylindroiulus britannicus
- Group
- Millipedes
- Peak month
- April
- Records since 2000
- 61
Austrosyrrhoe fimbriatus
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 57
Dasineura kiefferiana
- Group
- True flies
- Peak month
- July
- Records since 2000
- 57
Oxyethira frici
- Group
- Caddisflies
- Peak month
- July
- Records since 2000
- 53