Malmgrenia lunulata
- Peak month
- September
- Records since 2000
- 76
- Group
- Worms (annelids)
Sphaerosyllis pirifera
- Peak month
- April
- Records since 2000
- 76
- Group
- Worms (annelids)
Syllis licheri
- Peak month
- August
- Records since 2000
- 76
- Group
- Worms (annelids)
Ougia subaequalis
- Peak month
- August
- Records since 2000
- 75
- Group
- Worms (annelids)
Metavermilia multicristata
- Peak month
- August
- Records since 2000
- 74
- Group
- Worms (annelids)
Enipo kinbergi
- Peak month
- March
- Records since 2000
- 70
- Group
- Worms (annelids)
Saccocirrus papillocercus
- Peak month
- August
- Records since 2000
- 70
- Group
- Worms (annelids)
Ampharete borealis
- Peak month
- June
- Records since 2000
- 68
- Group
- Worms (annelids)
Mysta barbata
- Peak month
- August
- Records since 2000
- 68
- Group
- Worms (annelids)
Cirratulus incertus
- Peak month
- June
- Records since 2000
- 67
- Group
- Worms (annelids)
Dasybranchus caducus
- Peak month
- August
- Records since 2000
- 67
- Group
- Worms (annelids)
Scolelepis cantabra
- Peak month
- August
- Records since 2000
- 67
- Group
- Worms (annelids)
Synmerosyllis lamelligera
- Peak month
- July
- Records since 2000
- 67
- Group
- Worms (annelids)
Galathowenia fragilis
- Peak month
- July
- Records since 2000
- 66
- Group
- Worms (annelids)
Amblyosyllis spectabilis
- Peak month
- May
- Records since 2000
- 64
- Group
- Worms (annelids)
Fabriciola baltica
- Peak month
- April
- Records since 2000
- 63
- Group
- Worms (annelids)
Pista bansei
- Peak month
- January
- Records since 2000
- 63
- Group
- Worms (annelids)
Amythasides macroglossus
- Peak month
- August
- Records since 2000
- 62
- Group
- Worms (annelids)
Clymenura borealis
- Peak month
- July
- Records since 2000
- 62
- Group
- Worms (annelids)
Microphthalmus listensis
- Peak month
- July
- Records since 2000
- 62
- Group
- Worms (annelids)
Nereiphylla paretti
- Peak month
- April
- Records since 2000
- 62
- Group
- Worms (annelids)
Clavodorum kristiani
- Peak month
- August
- Records since 2000
- 60
- Group
- Worms (annelids)
Paradoneis eliasoni
- Peak month
- March
- Records since 2000
- 59
- Group
- Worms (annelids)
Neanthes nubila
- Peak month
- April
- Records since 2000
- 58
- Group
- Worms (annelids)
Plakosyllis brevipes
- Peak month
- May
- Records since 2000
- 58
- Group
- Worms (annelids)
Petta pusilla
- Peak month
- April
- Records since 2000
- 57
- Group
- Worms (annelids)
Pholoe minuta
- Peak month
- July
- Records since 2000
- 57
- Group
- Worms (annelids)
Proclea graffii
- Peak month
- June
- Records since 2000
- 57
- Group
- Worms (annelids)
Dendrobaena hortensis
- Peak month
- November
- Records since 2000
- 56
- Group
- Worms (annelids)
Echiuran worm
- Peak month
- October
- Records since 2000
- 56
- Scientific name
- Amalosoma eddystonense
Neoamphitrite edwardsii
- Peak month
- August
- Records since 2000
- 56
- Group
- Worms (annelids)
Eisenia andrei
- Peak month
- April
- Records since 2000
- 55
- Group
- Worms (annelids)
Malacoceros vulgaris
- Peak month
- May
- Records since 2000
- 55
- Group
- Worms (annelids)
Maldane sarsi
- Peak month
- August
- Records since 2000
- 55
- Group
- Worms (annelids)
Myrianida edwarsi
- Peak month
- January
- Records since 2000
- 55
- Group
- Worms (annelids)
Eumida mackiei
- Peak month
- March
- Records since 2000
- 54
- Group
- Worms (annelids)
Medicinal leech
- Peak month
- August
- Records since 2000
- 54
- Scientific name
- Hirudo medicinalis
Parasabella langerhansi
- Peak month
- August
- Records since 2000
- 54
- Group
- Worms (annelids)
Procerastea halleziana
- Peak month
- July
- Records since 2000
- 54
- Group
- Worms (annelids)
Scoletoma tetraura
- Peak month
- June
- Records since 2000
- 54
- Group
- Worms (annelids)
Ophelia roscoffensis
- Peak month
- April
- Records since 2000
- 53
- Group
- Worms (annelids)
Prosphaerosyllis chauseyensis
- Peak month
- May
- Records since 2000
- 53
- Group
- Worms (annelids)
Enipo elisabethae
- Peak month
- January
- Records since 2000
- 50
- Group
- Worms (annelids)
Polycirrus aurantiacus
- Peak month
- July
- Records since 2000
- 50
- Group
- Worms (annelids)