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Red Sea Slugs and Nudibranchs (107 species) 107

Red sea slugs are textbook examples of aposematism. By feeding on sponges and cnidarians, they sequester carotenoid pigments and chemical defences, advertising their unpalatability with vivid red. Phyllidiidae and Hypselodoris are classic exemplars of this honest-signal strategy.

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Goniobranchus sp.16

Goniobranchus sp.16
Hexabranchus lacer

Hexabranchus lacer

(Cuvier, 1804)
Goniobranchus reticulatus

Goniobranchus reticulatus

(Quoy & Gaimard, 1832)
Goniobranchus collingwoodi

Goniobranchus collingwoodi

(Rudman, 1987)
Cyerce kikutarobabai

Cyerce kikutarobabai

Hamatani, 1976
Verconia simplex

Verconia simplex

(Pease, 1871)
Nembrotha sp. 3

Nembrotha sp. 3
Kaloplocamus dokte

Kaloplocamus dokte

Vallès & Gosliner, 2006
Phyllodesmium sp. 8

Phyllodesmium sp. 8
Goniobranchus albopunctatus

Goniobranchus albopunctatus

Garrett, 1879
Nembrotha lorosae

Nembrotha lorosae

Pola, Paz-Sedano, Martín, L. Warren, Noble & Martín-Hervás, 2026
Coryphellina flamma

Coryphellina flamma

Ekimova, Deart, Antokhina, Mikhlina & Schepetov, 2022
Goniobranchus sp. 1

Goniobranchus sp. 1
Vayssierea felis

Vayssierea felis

(Collingwood, 1881)
Goniobranchus cf. variatus

Goniobranchus cf. variatus

(Risbec, 1928)
Facelina sp. 2

Facelina sp. 2
Verconia hongkongiensis

Verconia hongkongiensis

(Rudman, 1990)
Tenellia sp. 7

Tenellia sp. 7
Coryphellina delicata

Coryphellina delicata

(Gosliner & Willan, 1991)
Platydoris sanguinea

Platydoris sanguinea

Bergh, 1905
Martadoris sp. 1

Martadoris sp. 1
Phyllidia larryi

Phyllidia larryi

(Brunckhorst, 1993)
Gymnodoris ceylonica

Gymnodoris ceylonica

(Kelaart, 1858)
Platydoris cruenta

Platydoris cruenta

(Quoy & Gaimard, 1832)
Tenellia sp.45

Tenellia sp.45
Ceratodoris kondoi

Ceratodoris kondoi

(Hamatani, 2001)
Eubranchus echizenicus

Eubranchus echizenicus

Baba, 1975
Mariaglaja mandroroa

Mariaglaja mandroroa

(Gosliner, 2011)
Tenellia sp.70

Tenellia sp.70
Kalinga ornata

Kalinga ornata

Alder & Hancock, 1864
Sagaminopteron sp. 2

Sagaminopteron sp. 2
Coryphella amabilis

Coryphella amabilis

(Y. Hirano & Kuzirian, 1991)
Noumeaella sp. 1

Noumeaella sp. 1
Odontoglaja sp. 1

Odontoglaja sp. 1
Ceratodoris nakamotoensis

Ceratodoris nakamotoensis

(Hamatani, 2001)
Kabeiro rubroreticulata

Kabeiro rubroreticulata

Shipman & Gosliner, 2015
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Martadoris limaciformis

Martadoris limaciformis

(Eliot, 1908)
Doto sp.23

Doto sp.23
Nella osyoro

Nella osyoro

(Baba, 1940)
Aldisa fragaria

Aldisa fragaria

Tibiriça, Pola & Cervera, 2017
Hypselodoris bollandi

Hypselodoris bollandi

Gosliner & R. F. Johnson, 1999
Doto sp. 4

Doto sp. 4
Hermaea wrangeliae

Hermaea wrangeliae

(M. Ichikawa, 1993)
Tenellia sp.19

Tenellia sp.19
Verconia decussata

Verconia decussata

(Risbec, 1928)
Runcinida sp. 2

Runcinida sp. 2
Runcinida sp. 3

Runcinida sp. 3
Tenellia sp.97

Tenellia sp.97
Abronica turon

Abronica turon

A. Y. Kim & Gosliner, 2024
Goniobranchus splendidus

Goniobranchus splendidus

(Angas, 1864)
Janolus sp.20

Janolus sp.20
Lomanotus sp. 1

Lomanotus sp. 1
Aldisa sp. 3

Aldisa sp. 3
Doto sp.11

Doto sp.11
Goniobranchus daphne

Goniobranchus daphne

(Angas, 1864)
Goniobranchus sp. 4

Goniobranchus sp. 4
Gymnodoris bicolor

Gymnodoris bicolor

(Alder & Hancock, 1864)
Hexabranchus sandwichensis

Hexabranchus sandwichensis

(Gray, 1850)
Pleurobranchus weberi

Pleurobranchus weberi

(Bergh, 1905)
Tenellia sp.14

Tenellia sp.14
Ceratosoma sp. 3

Ceratosoma sp. 3
Niparaya sp.11

Niparaya sp.11
Rostanga sp. 1

Rostanga sp. 1
Goniobranchus sp.14

Goniobranchus sp.14
Cyerce elegans

Cyerce elegans

Bergh, 1870
Hexabranchus giganteus

Hexabranchus giganteus

Tibiriçá, Pola & Cervera, 2023
Plocamopherus maculatus

Plocamopherus maculatus

(Pease, 1860)
Gymnodoris sp.17

Gymnodoris sp.17
Tenellia sp.47

Tenellia sp.47
Verconia catalai

Verconia catalai

(Rudman, 1990)
Costasiella rubrolineata

Costasiella rubrolineata

M. Ichikawa, 1993
Doto rosacea

Doto rosacea

Baba, 1949
Goniobranchus sp.10

Goniobranchus sp.10
Lomanotus sp. 6

Lomanotus sp. 6
Miamira sp. 1

Miamira sp. 1
Phyllidiella rosans

Phyllidiella rosans

(Bergh, 1873)
Sakuraeolis sp. 3

Sakuraeolis sp. 3
Armina rubida

Armina rubida

(A. A. Gould, 1852)
Facelinidae sp. 9

Facelinidae sp. 9
Gastropteridae sp. 4

Gastropteridae sp. 4
Tenellia sp.46

Tenellia sp.46
Doris pseudoargus

Doris pseudoargus

(Rapp, 1827)
Madrella sanguinea

Madrella sanguinea

(Angas, 1864)
Carminodoris sp. 1

Carminodoris sp. 1
Chlamylla ignicrystalla

Chlamylla ignicrystalla

(Korshunova, Martynov, Bakken, Evertsen, Fletcher, Mudianta, H. Saito, Lundin, Schrödl & Picton, 2017)
Coryphella lineata

Coryphella lineata

(Lovén, 1846)
Cratena peregrina

Cratena peregrina

(Gmelin, 1791)
Goniobranchus sp.17

Goniobranchus sp.17
Goniobranchus woodwardae

Goniobranchus woodwardae

(Rudman, 1983)
Lomanotus sp. 4

Lomanotus sp. 4
Punctacteon fabreanus

Punctacteon fabreanus

(Crosse, 1873)
Thordisa sp.13

Thordisa sp.13
Cerberilla mosslandica

Cerberilla mosslandica

McDonald & Nybakken, 1975
Diaphorodoris luteocincta

Diaphorodoris luteocincta

(M. Sars, 1870)
Gastropteridae sp. 7

Gastropteridae sp. 7
Goniobranchus alderi

Goniobranchus alderi

(Collingwood, 1881)
Goniobranchus bombayanus

Goniobranchus bombayanus

(Winckworth, 1946)
Goniobranchus sp.21

Goniobranchus sp.21
Gymnodoris bricei

Gymnodoris bricei

De Souza-Canal & Valdés, 2025
Hypselodoris dollfusi

Hypselodoris dollfusi

(Pruvot-Fol, 1933)
Hypselodoris zebrina

Hypselodoris zebrina

(Alder & Hancock, 1864)
Peltodoris rubra

Peltodoris rubra

(Bergh, 1905)
Platydoris sp. 6

Platydoris sp. 6
Rostanga arbutus

Rostanga arbutus

(Angas, 1864)
Goniobranchus tinctorius

Goniobranchus tinctorius

(Rüppell & Leuckart, 1830)
Gymnodoris aurita

Gymnodoris aurita

(A. A. Gould, 1852)
Hexabranchus aureomarginatus

Hexabranchus aureomarginatus

Ostergaard, 1955
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