Below is a working checklist of segmented worm species that (potentially) live on Mount Desert Island or in the adjacent ocean. Please send corrections and updates to info@vfthomas.com. Photographs are welcome. Thank you.
| Class | Order | Family | Genus | Specific Epithet | authority | common name | Sources (full citations given after this table) |
| Polychaeta | Aciculata | Glyceridae | Glycera | dibranchiata | Ehlers | two-gilled bloodworm | Pollock (1998) [see note 1 below] |
| Polychaeta | Canalipalpata | Serpulidae | Spirorbis | borealis | Daudin | ? | observed by Champlainer (TFV) on kelp on Seal Harbor beach |