I owe a huge debt of gratitude to Dave Behrens and Terry Gosliner for their incredibly helpful assistance in identifying my nudibranch photos. For the vast majority of my photos, they turned my "I think it could possibly be..." into a positive i.d.

Order: NUDIBRANCHIA

Spanish Dancer Hexabranchus sanguineus	Spanish Dancer (juvenile) Hexabranchus sanguineus	Hallaxa hileenae Hallaxa hileenae
Phyllidia carlsonhoffi Phyllidia carlsonhoffi	Phyllidia coelestis Phyllidia coelestis	Phyllidia elegans Phyllidia elegans
Phyllidia elegans Phyllidia elegans	Phyllidia ocellata Phyllidia ocellata	Phyllidia ocellata Phyllidia ocellata
Phyllidia ocellata Phyllidia ocellata	Phyllidia polkadotsa Phyllidia polkadotsa	Phyllidia varicosa Phyllidia varicosa
Phyllidiella pustolosa Phyllidiella pustolosa	Phyllidiella pustulosa Phyllidiella pustulosa	Phyllidiella pustulosa Phyllidiella pustulosa
Phyllidiopsis shireenae Phyllidiopsis shireenae	Phyllidiopsis sphingis Phyllidiopsis sphingis	Reticulidia fungia Reticulidia fungia
Reticulidia halgerda Reticulidia halgerda	White Dendronotid Dendronotus albus	Dendronotus diversicolor Dendronotus diversicolor
Dendronotus regius Dendronotus regius	Dendronotus regius Dendronotus regius	Dendronotus sp. Dendronotus sp.
Melibe digitata Melibe digitata	Melibe mirifica Melibe mirifica	Melibe mirifica Melibe mirifica
Melibe mirifica Melibe mirifica	Melibe sp. Melibe sp.	Marionia sp. 1 Marionia sp. 1
Marionia sp. 2 Marionia sp. 2	Marionia sp. 2 Marionia sp. 2	Marionia sp. 3 Marionia sp. 3
Marionia sp. 4 Marionia sp. 4	Marionia sp. 5 Marionia sp. 5	Marionia viridescens Marionia viridescens
Lemon Peel Nudibranch Tochuina tetraquetra	Festive Nudibranch Tritonia festiva	California Armina Armina californica
Armina sp. Armina sp.	Frosted Nudibranch Dirona albolineata	Frosted Nudibranch Dirona albolineata
Gold Dirona Dirona pellucida	Janolus fuscus Janolus fuscus	Janolus sp. Janolus sp.
Spurilla major Spurilla major	Flabellina bicolor Flabellina bicolor	Flabellina exoptata Flabellina exoptata
Spanish Shawl Flabellina iodinea	Flabellina marcusorum Flabellina marcusorum	Flabellina rubrolineata Flabellina rubrolineata
Flabellina rubrolineata Flabellina rubrolineata	Three Lined Aeolid Flabellina trilineata	Flabellina verrucosa Flabellina verrucosa
Favorinus japonicus Favorinus japonicus	Favorinus tsuruganus Favorinus tsuruganus	Opalescent Nudibranch Hermissenda crassicornis
Opalescent Nudibranch Hermissenda crassicornis	Opalescent Nudibranch Hermissenda crassicornis	Moridilla brockii Moridilla brockii
Hilton's Aeolid Phidiana hiltoni	Phidiana indica Phidiana indica	Phyllodesmium briareum Phyllodesmium briareum
Phyllodesmium crypticum Phyllodesmium crypticum	Phyllodesmium crypticum Phyllodesmium crypticum	Phyllodesmium jakobsenae Phyllodesmium jakobsenae
Phyllodesmium kabiranum Phyllodesmium kabiranum	Phyllodesmium koehleri Phyllodesmium koehleri	Phyllodesmium koehleri Phyllodesmium koehleri
Phyllodesmium macphersonae Phyllodesmium macphersonae	Phyllodesmium magnum Phyllodesmium magnum	Phyllodesmium magnum Phyllodesmium magnum
Phyllodesmium opalescens Phyllodesmium opalescens	Phyllodesmium rudmani Phyllodesmium rudmani	Phyllodesmium rudmani Phyllodesmium rudmani
Phyllodesmium serratum Phyllodesmium serratum	Pteraeolidia ianthina Pteraeolidia ianthina	Pteraeolidia ianthina Pteraeolidia ianthina
Cuthona lagunae Cuthona lagunae	Phestilla lugubris Phestilla lugubris	Phestilla melanobrachia Phestilla melanobrachia
Phestilla melanobrachia Phestilla melanobrachia