Paralia sulcata
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 5,434
Described in 1873
39 species
Aplidium punctum
- Group
- Sea squirts
- Peak month
- June
- Records since 2000
- 2,619
Goniadella gracilis
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 1,408
Lauderia annulata
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 1,279
Skeletonema costatum
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 993
Ithytrichia lamellaris
- Group
- Caddisflies
- Peak month
- August
- Records since 2000
- 842
Parasyrphus punctulatus
- Group
- True flies
- Peak month
- April
- Records since 2000
- 549
Hydroptila forcipata
- Group
- Caddisflies
- Peak month
- July
- Records since 2000
- 505
Lempke's Gold Spot
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 483
Achyrolimonia decemmaculata
- Group
- True flies
- Peak month
- May
- Records since 2000
- 318
Caloplaca marina
- Group
- Lichens
- Peak month
- September
- Records since 2000
- 238
Lichtensia viburni
- Group
- True bugs
- Peak month
- March
- Records since 2000
- 214
Agraylea pallicornis
- Group
- Caddisflies
- Peak month
- May
- Records since 2000
- 194
Parasagitta elegans
- Group
- Other invertebrates
- Peak month
- July
- Records since 2000
- 180
Dicyrtoma fusca
- Group
- Springtails
- Peak month
- December
- Records since 2000
- 172
Silometopus elegans
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 161
Tipula helvola
- Group
- True flies
- Peak month
- July
- Records since 2000
- 147
Roncus lubricus
- Group
- Mites, harvestmen and other arachnids
- Peak month
- October
- Records since 2000
- 143
Mocyta amplicollis
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 125
Heteromysis formosa
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 123
Marenzelleria viridis
- Group
- Worms (annelids)
- Peak month
- March
- Records since 2000
- 120
Hilara cornicula
- Group
- True flies
- Peak month
- May
- Records since 2000
- 112
Fannia coracina
- Group
- True flies
- Peak month
- July
- Records since 2000
- 105
Metopobactrus prominulus
- Group
- Spiders
- Peak month
- July
- Records since 2000
- 103
Plutella incarnatella
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 102
Lonchaea sylvatica
- Group
- True flies
- Peak month
- May
- Records since 2000
- 99
Enochrus nigritus
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 98
Melangyna quadrimaculata
- Group
- True flies
- Peak month
- March
- Records since 2000
- 93
Euglesa parvula
- Group
- Molluscs
- Peak month
- August
- Records since 2000
- 89
Styloctetor romanus
- Group
- Spiders
- Peak month
- July
- Records since 2000
- 89
Hydroptila occulta
- Group
- Caddisflies
- Peak month
- July
- Records since 2000
- 88
Chalcosyrphus eunotus
- Group
- True flies
- Peak month
- May
- Records since 2000
- 86
Paradelphomyia fuscula
- Group
- True flies
- Peak month
- September
- Records since 2000
- 73
Hilara platyura
- Group
- True flies
- Peak month
- June
- Records since 2000
- 70
A ribbon worm
- Group
- Other invertebrates
- Peak month
- May
- Records since 2000
- 64
Epuraea marseuli
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 63
Golden Lantern-spider
- Group
- Spiders
- Peak month
- July
- Records since 2000
- 60
Chthonius tenuis
- Group
- Mites, harvestmen and other arachnids
- Peak month
- July
- Records since 2000
- 59
Thalassiosira nordenskioeldii
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 51