Prionospio dubia
- Group
- Worms (annelids)
- Peak month
- March
- Records since 2000
- 349
Described in 1961
7 species
Commensodorum commensalis
- Group
- Worms (annelids)
- Peak month
- March
- Records since 2000
- 161
Scolelepis gilchristi
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 123
Pedomicrobium manganicum
- Group
- Microorganisms and protists
- Peak month
- January
- Records since 2000
- 88
Hilara hybrida
- Group
- True flies
- Peak month
- May
- Records since 2000
- 87
Melinnacheres steenstrupi
- Group
- Crustaceans
- Peak month
- October
- Records since 2000
- 78
Simulium armoricanum
- Group
- True flies
- Peak month
- September
- Records since 2000
- 77