Nudibranchs (Opisthobranchs)

(Oregon to Southeast Alaska)

Click on the name of the Order to view the species within that category.
A representative sampling of species for each family are shown
to give an example of the characteristics exhibited by that group.













Hermaeidae
Aplysiopsis enteromorphae 
Sapsucker
Home > Northwest Shells & Marine Life > PNW Shells & Marine Life Photos > Nudibranchs

Haminoeidae
Haminoea japonica
Bubble Shells
Aglajidae
Aglaja ocelligera Melanochlamys diomedea
Aglaja
 
Acteonidae
Rictaxis punctocaelatus
Barrel Shell
Order Cephalaspidea








Limapontiidae
Olea hansineensis Placida dendritica
Hansine's Egg Eater / Sapsucker

Onchidorididae
 Acanthodoris hudsoni Acanthodoris lutea Acanthodoris nanaimoensis Acanthodoris pilosa Adalaria proxima Onchidoris bilamellata
Onchidorids

Pleurobranchidae
Berthella californica Berthella strongi
Sidegills

Order Thecosomata
Aplysiidae
Phyllaplysia taylori
Zebra Leafslug


Order Gymnosomata

Order Anaspidea

Clionidae
Clione limacina
Sea Angel


Cymbuliidae
Corolla spectabilis
Sea Butterfly


 

A few of these first families have shells, but they are actually opisthobranchs.  They are often grouped near the shelled gastropods in books.  We've placed them in both locations to aid in identification.  




Order Nudibranchia - Suborder Doridina



Plakobranchidae
Elysia hedgpethi
Sapsucker
Order Sacoglossa


Order Pleurobranchomorpha


 Discodorididae
Diaulula odonoghuei Geitodoris heathi Montereina lentiginosa Peltadoris nobilis Rostanga pulchra
Dorids and Sea Lemons

Polyceridae
Palio dubia Polycera tricolor Limacia cockerelli Triopha catalinae Triopha maculata
Multi-colored Dorids

 





Order Nudibranchia - Suborder Cladobranchia  (Page 1)



Corambidae
Corambe steinbergae Loy thompsoni
Corambids







Many southern species of nudibranchs may be spotted in the Pacific Northwest during El Niņo Events.   See our page covering El Niņo Event Range Shifts.
Tethyidae
Melibe leonina 
Lion's Melibe
 
Arminiidae
Armina californica
 Striped Nudibranch


Dironidae
Dirona albolineata Dirona pellucida Dirona picta
Dirona  

Aegiretidae
Aegires albopunctatus
Aegires
Goniodorididae
Ancula gibbosa Okenia vancouverensis
Ancula            Okenia










Cadlinidae
 Aldisa albomarginata
Aldisa cooperi Cadlina luteomarginata Calina modesta
Aldisa & Cadlina








Calycidorididae
Diaphorodoris lirulatocauda
Diaphorodoris

Nudibranch Egg Masses
nudibranch eggs Nudibranch eggs nudibranch eggs nudibranch eggs Nudibranch eggs Nudibranch eggs
Samples of some nudibranch egg masses
(click on photo to enlarge)

Actinocyclidae
Hallaxa chani
Dorid

Gastropteridae
Gastropteron pacificum
Stomach Wing
This species is not a nudibranch.  It is another type of
gastropod.  Since it is without a shell, and the only one
of its kind we show, we include it here.
Onchidiidae
Onchidella borealis Onchidella borealis Onchidella borealis
                     Deception Pass State Park, WA                                            Petersburg, AK, intertidal              Seal Rock, OR, intertidal
Onchidella borealis Dall, 1871
Leather Limpet
intertidal          central California to northern Alaska          size to 15mm
Can be found with a bit of hunting.  The species is small and blends into its environment.  
Despite its name, it is not closely related to limpets. It is air breathing and lives in the high intertidal zone. (click on photos to enlarge)
Cumanotidae
Cumanotus fernaldi
Aeolids




Tritoniidae
Tochuina gigantea Tritonia tetraquetra Tritonia festiva
Orange-Peel Nudibranch and Tritonias


Dorididae
Doris montereyensis Doris odhneri
Dorids and Sea Lemons




This page last revised: 3-11-2018

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Aeolidiidae
Aeolidia loui Cerberilla mosslandica
Aeolids

Dendronotidae
Dendronotus albus Dendronotus albus Dendronotus iris Dendronotus rufus Dendronotus subramosus
Dendronotus







Dotidae
Doto cf amyra Doto columbiana
Doto
 





Dendrodorididae
Doriopsilla fulva
Dorid












Order Nudibranchia - Suborder Cladobranchia  (Page 2)

Unidentiidae
Pacifia amica
Aeolid





Trinchesiidae
Catriona columbiana Diaphoreolis flavovulta Diaphoreolis lagunae Trinchesia albocrusta Zelentia fulgens Zelentia pustulata
Aeolids








Proctonotidae
Janolus fuscus Janolus gelidus
Janolus
Reference list for Nudibranch pages









Abronicidae
Abronica abronia
Aeolid

Cuthonidae
Cuthona divae
Cuthona
Cuthonellidae
Cuthonella cocoachroma Cuthonella concinna
Aeolids










Eubranchidae
Eubranchus rustyus
Aeolid



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Citation:  Pacific Northwest Shell Club, www.PNWSC.org





Coryphellidae
Coryphella verrucosa Himatina trophina Orienthella trilineata
Aeolid
Apataidae
Apata pricei
Aeolid
Diaphanidae
Diaphana californica
Diaphana









Acteocinidae
Acteocina culcitella   
Barrel-bubble Shells

Flabellinopsidae
Flabellinopsis iodinea
Aeolid


Paracoryphellidae
Ziminella japonica
Aeolid





















           












Facelinidae
Hermissenda crassicornis Hermissenda opalescens
Opalescent Nudibranch