Thelepus cincinnatus
- Peak month
- August
- Records since 2000
- 2,893
- Group
- Worms (annelids)
Syllis armillaris
- Peak month
- June
- Records since 2000
- 2,890
- Group
- Worms (annelids)
Sphaerodorum gracilis
- Peak month
- August
- Records since 2000
- 2,770
- Group
- Worms (annelids)
Boa worm
- Peak month
- March
- Records since 2000
- 2,768
- Scientific name
- Sthenelais boa
Phyllodoce groenlandica
- Peak month
- June
- Records since 2000
- 2,725
- Group
- Worms (annelids)
Eusyllis blomstrandi
- Peak month
- August
- Records since 2000
- 2,636
- Group
- Worms (annelids)
Spio armata
- Peak month
- June
- Records since 2000
- 2,636
- Group
- Worms (annelids)
Spio symphyta
- Peak month
- August
- Records since 2000
- 2,571
- Group
- Worms (annelids)
Abyssoninoe hibernica
- Peak month
- June
- Records since 2000
- 2,559
- Group
- Worms (annelids)
Pseudomystides limbata
- Peak month
- August
- Records since 2000
- 2,539
- Group
- Worms (annelids)
Gattyana cirrhosa
- Peak month
- June
- Records since 2000
- 2,528
- Group
- Worms (annelids)
Sphaerosyllis bulbosa
- Peak month
- September
- Records since 2000
- 2,526
- Group
- Worms (annelids)
Ampharete lindstroemi
- Peak month
- May
- Records since 2000
- 2,522
- Group
- Worms (annelids)
Green Worm
- Peak month
- April
- Records since 2000
- 2,506
- Scientific name
- Allolobophora chlorotica
Chone filicaudata
- Peak month
- August
- Records since 2000
- 2,489
- Group
- Worms (annelids)
Polycirrus medusa
- Peak month
- June
- Records since 2000
- 2,468
- Group
- Worms (annelids)
Eunice vittata
- Peak month
- August
- Records since 2000
- 2,458
- Group
- Worms (annelids)
Pisione remota
- Peak month
- July
- Records since 2000
- 2,419
- Group
- Worms (annelids)
Glycera unicornis
- Peak month
- June
- Records since 2000
- 2,412
- Group
- Worms (annelids)
Leeches
- Peak month
- April
- Records since 2000
- 2,391
- Scientific name
- Erpobdella octoculata
Bristleworm
- Peak month
- July
- Records since 2000
- 2,323
- Scientific name
- Spio filicornis
Eupolymnia nesidensis
- Peak month
- August
- Records since 2000
- 2,307
- Group
- Worms (annelids)
Paramphinome jeffreysii
- Peak month
- May
- Records since 2000
- 2,297
- Group
- Worms (annelids)
Paucibranchia bellii
- Peak month
- July
- Records since 2000
- 2,265
- Group
- Worms (annelids)
Trichobranchus roseus
- Peak month
- May
- Records since 2000
- 2,229
- Group
- Worms (annelids)
Syllis cornuta
- Peak month
- June
- Records since 2000
- 2,228
- Group
- Worms (annelids)
Spio decorata
- Peak month
- June
- Records since 2000
- 2,216
- Group
- Worms (annelids)
Lumbrineriopsis paradoxa
- Peak month
- August
- Records since 2000
- 2,197
- Group
- Worms (annelids)
Grey Worm
- Peak month
- October
- Records since 2000
- 2,160
- Scientific name
- Aporrectodea caliginosa
Psamathe fusca
- Peak month
- July
- Records since 2000
- 2,143
- Group
- Worms (annelids)
Phyllodoce rosea
- Peak month
- July
- Records since 2000
- 2,121
- Group
- Worms (annelids)
Malmgrenia arenicolae
- Peak month
- July
- Records since 2000
- 2,111
- Group
- Worms (annelids)
Gregarious fanworm
- Peak month
- August
- Records since 2000
- 2,081
- Scientific name
- Pseudopotamilla reniformis
Magelona minuta
- Peak month
- July
- Records since 2000
- 2,080
- Group
- Worms (annelids)
Trypanosyllis coeliaca
- Peak month
- August
- Records since 2000
- 2,077
- Group
- Worms (annelids)
Coral Worm
- Peak month
- September
- Records since 2000
- 2,048
- Scientific name
- Salmacina dysteri
Jasmineira caudata
- Peak month
- July
- Records since 2000
- 2,022
- Group
- Worms (annelids)
Polycirrus norvegicus
- Peak month
- July
- Records since 2000
- 2,019
- Group
- Worms (annelids)
Jasmineira elegans
- Peak month
- July
- Records since 2000
- 1,997
- Group
- Worms (annelids)
Anobothrus gracilis
- Peak month
- May
- Records since 2000
- 1,948
- Group
- Worms (annelids)
Dipolydora flava
- Peak month
- August
- Records since 2000
- 1,935
- Group
- Worms (annelids)
Sclerocheilus minutus
- Peak month
- August
- Records since 2000
- 1,912
- Group
- Worms (annelids)
Aricidea minuta
- Peak month
- April
- Records since 2000
- 1,905
- Group
- Worms (annelids)
Syllis variegata
- Peak month
- June
- Records since 2000
- 1,851
- Group
- Worms (annelids)
Asclerocheilus intermedius
- Peak month
- August
- Records since 2000
- 1,822
- Group
- Worms (annelids)
Calcareous tubeworm
- Peak month
- September
- Records since 2000
- 1,813
- Scientific name
- Serpula vermicularis
Aricidea catherinae
- Peak month
- April
- Records since 2000
- 1,808
- Group
- Worms (annelids)
Aurospio banyulensis
- Peak month
- July
- Records since 2000
- 1,804
- Group
- Worms (annelids)