Praxillella affinis
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 6,240
Described in 1872
24 species
Diplosoma spongiforme
- Group
- Sea squirts
- Peak month
- August
- Records since 2000
- 2,224
Candacia armata
- Group
- Crustaceans
- Peak month
- October
- Records since 2000
- 1,985
Lissoclinum perforatum
- Group
- Sea squirts
- Peak month
- September
- Records since 2000
- 1,798
Sea Strawberry
- Group
- Sea squirts
- Peak month
- September
- Records since 2000
- 518
Euclymene droebachiensis
- Group
- Worms (annelids)
- Peak month
- March
- Records since 2000
- 426
Phylo norvegica
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 317
Streblosoma intestinale
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 311
Trididemnum cereum
- Group
- Sea squirts
- Peak month
- September
- Records since 2000
- 260
Piratula hygrophila
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 228
Therochaeta flabellata
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 156
Hoplitis claviventris
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 144
Pachyneuron groenlandicum
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 142
Lasioglossum puncticolle
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 131
Crab spider
- Group
- Spiders
- Peak month
- May
- Records since 2000
- 121
Gnathia dentata
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 119
Tegenaria silvestris
- Group
- Spiders
- Peak month
- November
- Records since 2000
- 86
Arocatus longiceps
- Group
- True bugs
- Peak month
- March
- Records since 2000
- 80
Lankesteria ascidiae
- Group
- Microorganisms and protists
- Records since 2000
- 72
- Counties with records
- 2
Saccocirrus papillocercus
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 70
Metopoplax fuscinervis
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 62
Hoplolabis areolata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 58
Paraeuchaeta norvegica
- Group
- Crustaceans
- Peak month
- October
- Records since 2000
- 55
Oreoneta frigida
- Group
- Spiders
- Peak month
- August
- Records since 2000
- 53