Heterobranchia

Tectipleura

Cephalaspidea

Philinoidea

Colpodaspididae
Colpodaspis pusilla
Philinidae
Laona ventricosa
Philine quadripartita

Sacoglossa

Plakobranchoidea

Plakobranchidae
Elysia viridis
Placida dendritica
Hermaea bifida

Aplysiida

Aplysioidea

Aplysidae
Aplysia punctata

Nudipleura

Pleorobranchida

Pleurobranchidae
Berthella plumula
Pleurobranchus membranaceus

Doridida

Polyceroidea

Polyceridae

Polycera faeroensis
Polycera kernowensis
Polycera norvegica
Polycera quadrilineata
Crimora papillata
Limacia clavigera

Onchidoridoidea

Aegiridae
Aegires punctilucens
Goniodorididae
Trapania lineata
Ancula gibbosa
Pelagella castanea
Okenia aspersa
Okenia elegans
Okenia nodosa
Onchioridoidea
Acanthodoris pilosa
Adalaria loveni
Adalaria proxima
Atalodoris pictoni
Atalodoris sparsa
Idaliadoris depressa
Onchidoris bilamellata
Onchidoris muricata
Calycidoridae
Diaphorodoris luteocincta

Doridoidea

Cadlinidae
Cadlina laevis
Aldisa zetlandica
Dorididae
Doris pseudoargus
Discodorididae
Geitodoris planata
Rostanga rubra
Jorunna artsdatabankia
Jorunna tomentosa

Nudibranchia

Arminina

Arminidae
Armina loveni

Janolina

Janolidae
Antiopella cristata

Dendronotina

Lomanotidae
Lomanotus genei
Lomanotus marmoratus
Dendronotidae
Dendronotus europaeus
Dendronotus frondosus
Dendronotus keatleyae
Dendronotus lacteus
Dotidae
Doto coronata
Doto eireana
Doto fragilis
Doto hydrallmaniae
Doto hystrix
Doto maculata
Doto millbayana
Doto pinnatifida
Doto sarsiae
Doto sp.
Hancockiidae
Hancockia uncinata

Tritonina

Tritoniidae
Tritonia hombergii
Candiella lineata
Candiella plebeia

Aeolidina

Embletoniidae

Embletoniidae
Embletonia pulchra

Fionoidea

Flabellinidae
Coryphella browni
Coryphella chriskaugei
Coryphella gracilis
Coryphella lineata
Coryphella verrucosa
Edmundsella pedata
Flabellina pellucida
Eubranchidae
Eubranchus farrani
Eubranchus linensis
Eubranchus pallidus
Eubranchus tricolor
Eubranchus viriola
Eubranchus vitattus
Capellinia fustifera
Nudibranchus exiguus
Nudibranchus scintillans
Tergipedidae
Tergipes tergipes
Cuthonidae
Cuthona nana
Cuthonellidae
Cuthonella concinna
Trinchesiidae
Tenellia caerulea
Tenellia cuanensis
Tenellia foliata
Tenellia pustulata
Tenellia viridis
Rubramoena amoena
Rubramoena rubescens
Catriona aurantia
Facelinidae
Facelina annulicornis
Facelina auriculata
Facelina bostoniensis
Favorinus blianus
Favorinus branchialis
Aeolidiidae
Aeolidia filomenae
Aeolidia papillosa
Aeolidiella avatar
Aeolidiella glauca

Nudibranchia incertae sedis

Heroidae
Hero formosa