| Nom scientifique | Nom français | Nom anglais | 1°id. | 1°observateur |
|---|---|---|---|---|
| Sous_Classe EUTHYNEURA. | Euthyneures. | Euthyneura. | ||
| Ordre NUDIBRANCHES. | Nudibranches. | Nudibranchs. | ||
| Famille CLIONIDES. | Papillons de mer | Sea_Butterflies (naked) | ||
| Clione limacina | Papillon de mer | Sea_Butterfly. (naked) | 2008 | Abraham D. |
| Limacina retroversa | Limacine | Sea_Butterfly. | 1934 | Johnson C.W. |
| Famille DENDRONOTIDES | Nudibranches. | Nudibranchs. | ||
| Dendronotus frondosus | Nudibranche hérissé | Sea-slug (bushy-backed) | 2019 | BeBEST |
| Famille CHROMODORIDIDES | Nudibranches. | Nudibranchs. | ||
| Cadlina laevis | Cadlina atlantique | Cadlina (white_atlantic) | 2019 | BeBEST |
| Famille FLABELLINIDES. | Nudibranches. | Nudibranchs. | ||
| Flabellina salmonacea | Nudibranche couleur saumon | Nudibranch. (salmon_gilled) | 1987 | Abraham D. |
| Famille PHILINIDES | Nudibranches. | Nudibranchs. | ||
| Philine sinuata | Nudibranche | Nudibranch. | 1934 | Johnson C.W. |
| Ordre PULMONES. | Pulmonés. | Pulmonates. | ||
| Famille HELICIDES. | Escargots. | Snails. | ||
| Cepaea hortensis | Escargot des jardin | Snail (white-lipped) | 1981 | Abraham D. |
| Cepaea nemoralis | Escargot des bois | Snail (brown-lipped) | 2018 | Abraham D. |
| Arianta arbustorum | Hélice des bois | Snail (copse) | 2021 | Allen-Mahé S. |
| Helix aspersa | Petit-Gris | Snail. (garden) | 2011 | Abraham D. |
| Famille DISCIDE. | Escargots. | Snails. | ||
| Discus whitneyi | Bouton des forêts | Disc_Snail. (forest) | 2010 | Verneau N. |
| Famille HYGROMIIDES. | Escargots. | Snails. | ||
| Trochulus hispidus | Veloutée commune | Snail (hairy) | 2012 | Abraham D. |
| Famille ARIONIDES. | Limaces. | Slugs | ||
| Arion subfuscus | Limace sombre. | Slug. (dusky) | 1986 | Abraham D. |
| Arion distinctus | Limace distincte. | Slug. (distinct) | 2014 | Jackman L. |
| Arion ater | Limace noire. | Slug. (black) | 2011 | Abraham D. |
| Famille LIMACIDES. | Limaces. | Slugs |