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.

Philippines (Page 1)

Aegires villosus Aegires villosus	Armina sp. Armina sp.	Atagema sp. Atagema sp.
Cadlinella ornatissima Cadlinella ornatissima	Ceratosoma gracillimum Ceratosoma gracillimum	Ceratosoma gracillimum Ceratosoma gracillimum
Ceratosoma sinuatum Ceratosoma sinuatum	Ceratosoma sinuatum Ceratosoma sinuatum	Ceratosoma tenue Ceratosoma tenue
Ceratosoma trilobatum Ceratosoma trilobatum	Chromodoris albopunctata Chromodoris albopunctata	Chromodoris annae Chromodoris annae
Chromodoris annae Chromodoris annae	Chromodoris aspersa Chromodoris aspersa	Chromodoris aureopurpurea Chromodoris aureopurpurea
Chromodoris coi Chromodoris coi	Chromodoris colemani Chromodoris colemani	Chromodoris dianae Chromodoris dianae
Chromodoris dianae Chromodoris dianae	Chromodoris elisabethina Chromodoris elisabethina	Chromodoris fidelis Chromodoris fidelis
Chromodoris geometrica Chromodoris geometrica	Chromodoris hintuanensis Chromodoris hintuanensis	Chromodoris joshi Chromodoris joshi
Chromodoris magnifica Chromodoris magnifica	Chromodoris magnifica Chromodoris magnifica	Chromodoris preciosa Chromodoris preciosa
Chromodoris rubrocornuta Chromodoris rubrocornuta	Chromodoris sp. Chromodoris sp.	Chromodoris striatella Chromodoris striatella
Chromodoris cf. strigata Chromodoris cf. strigata	Chromodoris tinctoria Chromodoris tinctoria	Chromodoris tinctoria Chromodoris tinctoria
Chromodoris willani Chromodoris willani	Dendrodoris denisoni Dendrodoris denisoni	Dendrodoris fumata Dendrodoris fumata
Dendrodoris guttata Dendrodoris guttata	Dendrodoris nigra Dendrodoris nigra	Discodoris boholensis Discodoris boholensis
Discodoris lilacina Discodoris lilacina	Discodoris lilacina Discodoris lilacina	Favorinus japonicus Favorinus japonicus
Favorinus tsuruganus Favorinus tsuruganus	Flabellina bicolor Flabellina bicolor	Flabellina exoptata Flabellina exoptata
Glossodoris atromarginata Glossodoris atromarginata	Glossodoris averni Glossodoris averni	Glossodoris cincta Glossodoris cincta
Glossodoris pallida Glossodoris pallida	Glossodoris pallida Glossodoris pallida	Glossodoris rufomarginata Glossodoris rufomarginata
Glossodoris sp. Glossodoris sp.	Goniodoris felis Goniodoris felis	Gymnodoris aurita Gymnodoris aurita
Halgerda batangas Halgerda batangas	Halgerda willeyi Halgerda willeyi	Halgerda willeyi Halgerda willeyi
Hallaxa hileenae Hallaxa hileenae	Spanish Dancer Hexabranchus sanguineus	Spanish Dancer (juvenile) Hexabranchus sanguineus
Hoplodoris estrelyado Hoplodoris estrelyado	Hoplodoris nodulosa Hoplodoris nodulosa	Hypselodoris apolegma Hypselodoris apolegma
Hypselodoris apolegma Hypselodoris apolegma	Hypselodoris bollandi Hypselodoris bollandi	Hypselodoris bollandi (juvenile) Hypselodoris bollandi
Hypselodoris bollandi Hypselodoris bollandi	Hypselodoris bullocki Hypselodoris bullocki	Hypselodoris emma Hypselodoris emma
Hypselodoris infucata Hypselodoris infucata	Hypselodoris infucata Hypselodoris infucata	Hypselodoris krakatoa Hypselodoris krakatoa
Hypselodoris krakatoa Hypselodoris krakatoa	Hypselodoris krakatoa (juvenile) Hypselodoris krakatoa	Hypselodoris maculosa Hypselodoris maculosa
Hypselodoris purpureomaculosa Hypselodoris purpureomaculosa	Hypselodoris reidi Hypselodoris reidi	Hypselodoris reidi Hypselodoris reidi
Hypselodoris whitei Hypselodoris whitei	Janolus sp. Janolus sp.	Jorunna funebris Jorunna funebris
Jorunna rubescens Jorunna rubescens	Jorunna sp. Jorunna sp.	Kaloplocamus acutus Kaloplocamus acutus
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