
Akera bullata is a species of sea snail, a marine opisthobranch gastropod mollusk in the family Akeridae, a family that is related to the sea hares. This species is the only European representative of the genus Akera.

Gleba cordata is a species of sea butterfly, a floating and swimming sea snail or sea slug, a pelagic marine gastropod mollusk in the family Cymbuliidae.

Iothia fulva is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Lepetidae, one of the families of true limpets.

Lamellaria latens is a species of small, slug-like sea snail, a marine gastropod mollusc in the family Velutinidae. It is native to the northeastern Atlantic Ocean and the Mediterranean Sea where it feeds on colonial ascidians.

Lepeta caeca, common name the northern blind limpet, is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Lepetidae, one of the families of true limpets.

Limacia clavigera, sometimes known by the common name orange-clubbed sea slug, is a sea slug, a species of dorid nudibranch. It is a marine gastropod mollusc in the family Polyceridae.

Onchidoris muricata is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae.

Polycera quadrilineata, is a sea slug, a species of dorid nudibranch. It is a marine gastropod mollusc in the family Polyceridae. The specific epithet quadrilineata means four-lined and refers to the four longitudinal black lines present on the original specimen. This species is sometimes called the fourline nudibranch. In 2020 a integrative molecular and morphological study showed that P. quadrilineata was a complex of two species in the NE Atlantic and one of these species was given the new name Polycera norvegica.

Tectura virginea is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Lottiidae, one of the families of true limpets. It is commonly known as the white tortoiseshell limpet.

Testudinalia testudinalis, common name the common tortoise limpet, is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Lottiidae, one of the families of true limpets. It is commonly known as the plant limpet or tortoiseshell limpet.

Velutina plicatilis is a species of small sea snail, a marine gastropod mollusk in the family Velutinidae.

Velutina velutina, common name the velvet shell, is a species of small sea snail with a transparent shell, a marine gastropod mollusk in the family Velutinidae.