I owe a huge debt of gratitude to Dave Behrens for his incredibly helpful assistance in identifying the vast majority of the my nudibranch photos. For the majority of these photos, he 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 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 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 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
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 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
Phyllodesmium sp. Phyllodesmium sp.	Phyllodesmium sp. Phyllodesmium sp.	Pteraeolidia ianthina Pteraeolidia ianthina
Pteraeolidia ianthina Pteraeolidia ianthina	Phestilla lugubris Phestilla lugubris	Phestilla melanobrachia Phestilla melanobrachia
Phestilla melanobrachia Phestilla melanobrachia