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Transparent Sea Slugs and Nudibranchs (56 species) 56

Transparency is the open-water camouflage of pelagic sea slugs. Pteropods (Thecosomata / Gymnosomata) and Glaucus atlanticus dissolve into the surrounding seawater and drift through the open ocean nearly invisible to predators.

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Mourgona sp. 1

Mourgona sp. 1

Unidentia sp. 2

Unidentia sp. 2

Notobryon wardi

Notobryon wardi

Odhner, 1936

Polybranchia orientalis

Polybranchia orientalis

(Kelaart, 1858)

Pleurehdera sp. 1

Pleurehdera sp. 1

Cyerce katiae

Cyerce katiae

K. Moreno, Gosliner, N. G. Wilson, Krug & Á. Valdés, 2025

Melibe engeli

Melibe engeli

Risbec, 1937

Polybranchia jannae

Polybranchia jannae

Medrano, Krug, Gosliner, Biju Kumar & Á. Valdés, 2018

Hermaea sp. 4

Hermaea sp. 4

Pruvotfolia sp. 4

Pruvotfolia sp. 4

Pruvotfolia sp. 1

Pruvotfolia sp. 1

Pruvotfolia sp. 5

Pruvotfolia sp. 5

Phyllodesmium undulatum

Phyllodesmium undulatum

E. Moore & Gosliner, 2014

Lamprohaminoea sp. 4

Lamprohaminoea sp. 4

Janolus sp.13

Janolus sp.13

Cyerce goodheartae

Cyerce goodheartae

K. Moreno, Gosliner, N. G. Wilson, Krug & Á. Valdés, 2025

Mourgona sp. 2

Mourgona sp. 2

Pseudobornella orientalis

Pseudobornella orientalis

Baba, 1932

Cavolinia inflexa

Cavolinia inflexa

(Lesueur, 1813)

Melibe japonica

Melibe japonica

Eliot, 1913

Melibe megaceras

Melibe megaceras

Gosliner, 1987

Phylliroe bucephala

Phylliroe bucephala

Lamarck, 1816

Cephalopyge trematoides

Cephalopyge trematoides

(Chun, 1889)

Mourgona osumi

Mourgona osumi

Hamatani, 1994

Favorinus sp. 5

Favorinus sp. 5

Cavolinia uncinata

Cavolinia uncinata

(A. d'Orbigny, 1835)

Hyalocylis striata

Hyalocylis striata

(Rang, 1828)

Clio pyramidata

Clio pyramidata

Linnaeus, 1767

Creseis acicula

Creseis acicula

(Rang, 1828)

Janolus sp.17

Janolus sp.17

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