Sooty shearwater
- Group
- Birds
- Records since 2000
- 8,460
- Scientific name
- Puffinus griseus
Grannom Caddisfly
- Group
- Caddisflies
- Records since 2000
- 8,446
- Scientific name
- Brachycentrus subnubilus
Norway haddock
- Group
- Fish
- Records since 2000
- 8,417
- Scientific name
- Sebastes viviparus
Elmis aenea
- Group
- Beetles
- Records since 2000
- 8,233
- Peak month
- September
Baked Bean Ascidian
- Group
- Sea squirts
- Records since 2000
- 8,072
- Scientific name
- Dendrodoa grossularia
Blonde ray
- Group
- Fish
- Records since 2000
- 7,660
- Scientific name
- Raja brachyura
Centropages typicus
- Group
- Crustaceans
- Records since 2000
- 7,143
- Peak month
- September
Wandering Snail
- Group
- Molluscs
- Records since 2000
- 7,038
- Scientific name
- Ampullaceana balthica
Pale Mottled Willow
- Group
- Butterflies and moths
- Records since 2000
- 6,778
- Scientific name
- Caradrina clavipalpis
Temora longicornis
- Group
- Crustaceans
- Records since 2000
- 6,752
- Peak month
- September
Snakelocks Anemone
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 6,676
- Scientific name
- Anemonia viridis
Snake Pipefish
- Group
- Fish
- Records since 2000
- 6,648
- Scientific name
- Entelurus aequoreus
Bread-crumb sponge
- Group
- Sponges
- Records since 2000
- 6,532
- Scientific name
- Halichondria panicea
Angle Shades
- Group
- Butterflies and moths
- Records since 2000
- 6,497
- Scientific name
- Phlogophora meticulosa
Garden Spider
- Group
- Spiders
- Records since 2000
- 6,249
- Scientific name
- Araneus diadematus
Crater sponge
- Group
- Sponges
- Records since 2000
- 6,234
- Scientific name
- Hemimycale columella
New-Zealand barnacle, Australasian barnacle
- Group
- Other invertebrates
- Records since 2000
- 5,911
- Scientific name
- Austrominius modestus
European Crane Fly
- Group
- True flies
- Records since 2000
- 5,709
- Scientific name
- Tipula paludosa
Carrageen
- Group
- Seaweeds and algae
- Records since 2000
- 5,647
- Scientific name
- Chondrus crispus
Common Water-boatman
- Group
- True bugs
- Records since 2000
- 5,622
- Scientific name
- Notonecta glauca
Elephant ear sponge
- Group
- Sponges
- Records since 2000
- 5,537
- Scientific name
- Pachymatisma johnstonia
Sea-mat
- Group
- Bryozoans
- Records since 2000
- 5,479
- Scientific name
- Membranipora membranacea
Common Cockle
- Group
- Molluscs
- Records since 2000
- 5,323
- Scientific name
- Cerastoderma edule
Laver Spire Snail
- Group
- Molluscs
- Records since 2000
- 5,079
- Scientific name
- Peringia ulvae
Seven-armed Starfish
- Group
- Starfish and sea urchins
- Records since 2000
- 5,026
- Scientific name
- Luidia ciliaris
Dirty Sea-squirt
- Group
- Sea squirts
- Records since 2000
- 5,013
- Scientific name
- Ascidiella aspersa
Rosy Feather-star
- Group
- Starfish and sea urchins
- Records since 2000
- 4,848
- Scientific name
- Antedon bifida
European pilchard, Pilchard
- Group
- Fish
- Records since 2000
- 4,801
- Scientific name
- Sardina pilchardus
Pectoral Sandpiper
- Group
- Birds
- Records since 2000
- 4,746
- Scientific name
- Calidris melanotos
Broad-bordered Yellow Underwing
- Group
- Butterflies and moths
- Records since 2000
- 4,656
- Scientific name
- Noctua fimbriata
River Limpet
- Group
- Molluscs
- Records since 2000
- 4,616
- Scientific name
- Ancylus fluviatilis
Mink
- Group
- Mammals
- Records since 2000
- 4,610
- Scientific name
- Mustela vison
Freshwater White-clawed Crayfish
- Group
- Crustaceans
- Records since 2000
- 4,536
- Scientific name
- Austropotamobius pallipes
Flat Top Shell
- Group
- Molluscs
- Records since 2000
- 4,533
- Scientific name
- Steromphala umbilicalis
Achnanthes minutissima
- Group
- Seaweeds and algae
- Records since 2000
- 4,527
- Peak month
- September
Pomarine Jaeger
- Group
- Birds
- Records since 2000
- 4,520
- Scientific name
- Stercorarius pomarinus
Lunar Underwing
- Group
- Butterflies and moths
- Records since 2000
- 4,465
- Scientific name
- Anchoscelis lunosa
European seabass, Bass
- Group
- Fish
- Records since 2000
- 4,443
- Scientific name
- Dicentrarchus labrax
Sand Star
- Group
- Starfish and sea urchins
- Records since 2000
- 4,439
- Scientific name
- Astropecten irregularis
Red-backed Shrike
- Group
- Birds
- Records since 2000
- 4,335
- Scientific name
- Lanius collurio
Sand Goby
- Group
- Fish
- Records since 2000
- 4,325
- Scientific name
- Pomatoschistus minutus
Hop
- Group
- Flowering plants
- Records since 2000
- 4,303
- Scientific name
- Humulus lupulus
Black Brittlestar
- Group
- Starfish and sea urchins
- Records since 2000
- 4,267
- Scientific name
- Ophiocomina nigra
Sea Mouse
- Group
- Worms (annelids)
- Records since 2000
- 4,247
- Scientific name
- Aphrodita aculeata
Hydraena gracilis
- Group
- Beetles
- Records since 2000
- 4,245
- Peak month
- September
Rabbit fish
- Group
- Fish
- Records since 2000
- 4,170
- Scientific name
- Chimaera monstrosa
Small-eyed Ray
- Group
- Fish
- Records since 2000
- 4,087
- Scientific name
- Raja microocellata
Sigara dorsalis
- Group
- True bugs
- Records since 2000
- 4,037
- Peak month
- September