Marine worm
- Group
- Worms (annelids)
- Peak month
- May
- Records since 2000
- 3,912
Described in 1937
16 species
Sugiura chengshanense
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 2,700
Monocorophium sextonae
- Group
- Crustaceans
- Peak month
- July
- Records since 2000
- 1,285
Iberian Chiffchaff
- Group
- Birds
- Peak month
- May
- Records since 2000
- 658
Corophium arenarium
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 433
Limnophyes asquamatus
- Group
- True flies
- Peak month
- September
- Records since 2000
- 430
Rhodymenia ardissonei
- Group
- Seaweeds and algae
- Peak month
- August
- Records since 2000
- 396
Ophonus schaubergerianus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 283
Common Fern Moth
- Group
- Butterflies and moths
- Peak month
- May
- Records since 2000
- 260
Macrochaeta helgolandica
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 248
Monocorophium insidiosum
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 245
Sphegina verecunda
- Group
- True flies
- Peak month
- June
- Records since 2000
- 124
Arboridia ribauti
- Group
- True bugs
- Peak month
- October
- Records since 2000
- 98
Clostridium perfringens
- Group
- Microorganisms and protists
- Peak month
- September
- Records since 2000
- 65
Exechia pseudofestiva
- Group
- True flies
- Peak month
- August
- Records since 2000
- 58
Dacnusa longiradialis
- Group
- Bees, wasps and ants
- Peak month
- June
- Records since 2000
- 56