Metridia lucens
- Group
- Crustaceans
- Peak month
- November
- Records since 2000
- 3,549
Described in 1865
45 species
Nephtys incisa
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 3,410
Ampharete finmarchica
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 2,896
Painted goby
- Group
- Fish
- Peak month
- September
- Records since 2000
- 1,922
Marbled Sedge
- Group
- Caddisflies
- Peak month
- July
- Records since 2000
- 1,687
Diastylis rugosa
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 1,438
Harmothoe glabra
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 1,390
Adicella reducta
- Group
- Caddisflies
- Peak month
- June
- Records since 2000
- 1,185
Bristleworm
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 1,126
Limnephilus extricatus
- Group
- Caddisflies
- Peak month
- October
- Records since 2000
- 994
Hypereteone foliosa
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 874
Ampharete grubei
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 827
Cumella pygmaea
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 797
Diastyloides biplicatus
- Group
- Crustaceans
- Peak month
- March
- Records since 2000
- 654
Sige fusigera
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 542
Lumbrineris futilis
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 440
Praxillella praetermissa
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 437
Rhodine loveni
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 373
Isias clavipes
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 296
Callicorixa wollastoni
- Group
- True bugs
- Peak month
- April
- Records since 2000
- 254
Gattyana cirrosa
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 248
Pseudocalanus elongatus
- Group
- Crustaceans
- Peak month
- July
- Records since 2000
- 222
Limnephilus politus
- Group
- Caddisflies
- Peak month
- September
- Records since 2000
- 178
Hydatophylax infumatus
- Group
- Caddisflies
- Peak month
- October
- Records since 2000
- 171
Tinodes assimilis
- Group
- Caddisflies
- Peak month
- June
- Records since 2000
- 170
Wormaldia subnigra
- Group
- Caddisflies
- Peak month
- August
- Records since 2000
- 166
Black-lined periwinkle
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 136
Stenacis evonymi
- Group
- Mites, harvestmen and other arachnids
- Peak month
- September
- Records since 2000
- 136
Megamelodes quadrimaculatus
- Group
- True bugs
- Peak month
- October
- Records since 2000
- 129
Nereiphylla lutea
- Group
- Worms (annelids)
- Peak month
- March
- Records since 2000
- 117
Atlantopsocus adustus
- Group
- Other insects
- Peak month
- August
- Records since 2000
- 104
Orthotylus virescens
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 103
Siphona pauciseta
- Group
- True flies
- Peak month
- June
- Records since 2000
- 92
Thracia gracilis
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 91
Tryphosella nanoides
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 91
Campylaspis costata
- Group
- Crustaceans
- Peak month
- January
- Records since 2000
- 71
Enipo kinbergi
- Group
- Worms (annelids)
- Peak month
- March
- Records since 2000
- 70
Mysta barbata
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 68
Swollen Spire Snail
- Group
- Molluscs
- Peak month
- April
- Records since 2000
- 67
Limnephilus ignavus
- Group
- Caddisflies
- Peak month
- September
- Records since 2000
- 60
Anthocoris sarothamni
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 57
Cardinal Click Beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 57
Cryptorchestia cavimana
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 56
Maldane sarsi
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 55
Clanoptilus barnevillei
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 54