Sea Slugs in Izu Oshima 265

Tambja sagamiana

(Baba, 1955)

Halgerda okinawa

Carlson & Hoff, 2000

Micromelo barbarae

Feliciano, Malaquias, Stout, Brenzinger, Gosliner & Á. Valdés, 2021

Caloria indica

(Bergh, 1896)

Hypselodoris festiva

(A. Adams, 1861)

Kaloplocamus acutus

Baba, 1949

Doriprismatica atromarginata

(Cuvier, 1804)

Nembrotha sp. 3

Hydatina physis

(Linnaeus, 1758)

Thecacera pacifica

(Bergh, 1884)

Babakina indopacifica

Gosliner, Gonzalez-Duarte & Cervera, 2007

Roboastra gracilis

(Bergh, 1877)

Cadlinella ornatissima

(Risbec, 1928)

Chromodoris sp. 6

Siphopteron sp. 2

Ceratosoma bicolor

Baba, 1949

Phyllidia ocellata

Cuvier, 1804

Dermatobranchus striatellus

Baba, 1949

Eubranchus cf. leopoldoi

Caballer, Ortea & Espinosa, 2001

Chromodoris colemani

Rudman, 1982

Hexabranchus lacer

(Cuvier, 1804)

Gymnodoris okinawae

Baba, 1936

Hypselodoris decorata

(Risbec, 1928)

Dendrodoris krusensternii

(J. E. Gray, 1850)

Moridilla brockii

Bergh, 1888

Umbraculum umbraculum

([Lightfoot], 1786)

Berthellina delicata

(Pease, 1861)

Pleurobranchus peronii

Cuvier, 1804

Tambja amakusana

Baba, 1987

Gymnodoris impudica

(Rüppell & Leuckart, 1830)

Ceratosoma trilobatum

(J. E. Gray, 1850)

Goniobranchus setoensis

(Baba, 1938)

Phyllidiopsis krempfi

Pruvot-Fol, 1957

Dermatobranchus ornatus

(Bergh, 1874)

Melibe papillosa

(de Filippi, 1867)

Samla takashigei

Korshunova, Martynov, Bakken, Evertsen, Fletcher, Mudianta, H. Saito, Lundin, Schrödl & Picton, 2017

Launsina tanyae

Ekimova, Carmona, Mikhlina, Grishina, Stanovova, Schepetov, Hoover, De Souza-Canal, K. O. Kuznetsov & Á. Valdés, 2026

Bullina lineata

(J. E. Gray, 1825)

Martadoris sp. 2

Thecacera pikachu

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

Phyllidiella pustulosa

(Cuvier, 1804)

Aplysia oculifera

A. Adams & Reeve, 1850

Thuridilla splendens

(Baba, 1949)

Placida kevinleei

McCarthy, Krug & Á. Valdés, 2017

Thecacera sp. 2

Ceratosoma tenue

Abraham, 1876

Goniobranchus verrieri

(Crosse, 1875)

Glossodoris rufomarginata

(Bergh, 1890)

Hypselodoris placida

(Baba, 1949)

Coryphellina exoptata

(Gosliner & Willan, 1991)

Hantazuia yugoikedai

Korshunova, Fletcher & Martynov, 2025

Cratena sp. 2

Favorinus tsuruganus

Baba & Abe, 1964

Pleurolidia juliae

Burn, 1966

Tenellia sibogae

(Bergh, 1905)

Miamira flavicostata

Baba, 1940

Cratena sp. 3

Bornella hermanni

Angas, 1864

Thuridilla vataae

(Risbec, 1928)

Colpodaspis thompsoni

G. H. Brown, 1979

Phanerophthalmus perpallidus

Risbec, 1928

Biuve fulvipunctata

(Baba, 1938)

Aplysia juliana

Quoy & Gaimard, 1832

Dolabrifera dolabrifera

(Rang, 1828)

Stylocheilus striatus

(Quoy & Gaimard, 1832)

Elysia asbecki

Wägele, Stemmer, Burghardt & Händeler, 2010

Elysia trisinuata

Baba, 1949

Thecacera picta

Baba, 1972

Limacia ornata

(Baba, 1937)

Bermudella japonica

(Baba, 1949)

Diaphorodoris mitsuii

(Baba, 1938)

Gymnodoris citrina

(Bergh, 1877)

Doris sugashimae

(Baba, 1998)

Platydoris sp. 1

Goniobranchus albonares

(Rudman, 1990)

Goniobranchus geometricus

(Risbec, 1928)

Goniobranchus roboi

(Gosliner & Behrens, 1998)

Chromodoris willani

Rudman, 1982

Diversidoris flava

(Eliot, 1904)

Verconia varians

(Pease, 1871)

Hypselodoris tryoni

(Garrett, 1873)

Dendrodoris nigra

(W. Stimpson, 1855)

Melibe viridis

(Kelaart, 1858)

Doto bella

Baba, 1938

Cratena sp. 1

Favorinus japonicus

Baba, 1949

Setoeolis inconspicua

(Baba, 1938)

Pelagella longicornis

Paz-Sedano, Smirnoff, Gosliner & Pola, 2023

Jorunna parva

(Baba, 1938)

Elysia sp.10

Coryphellina sp. 4

Unidentia sp. 5

Gastropteridae spp.

Bulla vernicosa

A. A. Gould, 1859

Diniatys dentifer

(A. Adams, 1850)

Haloa japonica

(Pilsbry, 1895)

Aplysia kurodai

(Baba, 1937)

Elysia sp.16

Elysia tomentosa

K. R. Jensen, 1997

Thuridilla livida

(Baba, 1955)

Polybranchia orientalis

(Kelaart, 1858)

Stiliger aureomarginatus

K. R. Jensen, 1993

Hermaea sp. 2

Pleurobranchus forskalii

Rüppell & Leuckart, 1828

Goniodoridella borealis

Martynov, Sanamyan & Korshunova, 2015

Pelagella felis

(Baba, 1949)

Okenia rhinorma

Rudman, 2007

Gymnodoris alba

(Bergh, 1877)

Gymnodoris inornata

(Bergh, 1880)

Rostanga orientalis

Rudman & Avern, 1989

Chromodoris aspersa

(A. A. Gould, 1852)

Goniobranchus collingwoodi

(Rudman, 1987)

Goniobranchus leopardus

(Rudman, 1987)

Chromodoris orientalis

Rudman, 1983

Goniobranchus sp.16

Ardeadoris averni

(Rudman, 1985)

Hypselodoris maritima

(Baba, 1949)

Verconia purpurea

(Baba, 1949)

Thorunna halourga

R. F. Johnson & Gosliner, 2001

Doriopsilla miniata

(Alder & Hancock, 1864)

Phyllidia picta

Pruvot-Fol, 1957

Phyllidiopsis fissurata

Brunckhorst, 1993

Phyllidiopsis pipeki

Brunckhorst, 1993

Janolus indicus

(Eliot, 1909)

Samla riwo

(Gosliner & Willan, 1991)

Eubranchus sp. 1

Phyllodesmium macphersonae

(Burn, 1962)

Sakuraeolis sakuracea

Y. Hirano, 1999

Bulbaeolidia alba

(Risbec, 1928)

Tenellia anulata

(Baba, 1949)

Abronica purpureoanulata

(Baba, 1961)

Tenellia sp. 2

Tenellia nakapila

A. Y. Kim & Gosliner, 2024

Pteraeolidia semperi

(Bergh, 1870)

Aeolidina sp. 2

Tenellia sp.21

Catriona signifera

Baba, 1961

Tenellia sp.23

Polycera sp.13

Scyllaea pelagica

Linnaeus, 1758

Colinatys sp. 1

Gymnodoris sp.32

Hexabranchus sanguineus

(Rüppell & Leuckart, 1830)

Paratritonia lutea

Baba, 1949

Phyllodesmium sp. 8

Thuridilla albopustulosa

Gosliner, 1995

Goniobranchus coi

(Risbec, 1956)

Phyllidia willani

Brunckhorst, 1993

Tritoniopsis elegans

(Audouin, 1826)

Diaphorodoris sp. 1

Hamineobulla kawamurai

Habe, 1950

Spinoaglaja orientalis

(Baba, 1949)

Hermania orca

(Gosliner, 1988)

Chelidonura amoena

Bergh, 1905

Sagaminopteron ornatum

Tokioka & Baba, 1964

Aplysia gigantea

G. B. Sowerby II, 1869

Aplysia nigrocincta

E. von Martens, 1880

Dolabella auricularia

([Lightfoot], 1786)

Julia japonica

Kuroda & Habe, 1951

Oxynoe kabirensis

Hamatani, 1980

Elysia atroviridis

Baba, 1955

Elysia obtusa

Baba, 1938

Elysia lobata

A. A. Gould, 1852

Elysia marginata

(Pease, 1871)

Elysia rufescens

(Pease, 1871)

Elysia sp. 7

Thuridilla kathae

Gosliner, 1995

Ercolania subviridis

(Baba, 1959)

Placida babai

Ev. Marcus, 1982

Stiliger sp. 1

Pleurobranchus albiguttatus

(Bergh, 1905)

Polycera sp. 1

Plocamopherus imperialis

Angas, 1864

Nembrotha lineolata

Bergh, 1905

Nembrotha sp. 1

Tyrannodoris luteolineata

(Baba, 1936)

Martadoris sp. 1

Ceratodoris barnardi

(Baba, 1937)

Aegires hapsis

Fahey & Gosliner, 2004

Gymnodoris subornata

Baba, 1960

Taringa halgerda

Gosliner & Behrens, 1998

Atagema spongiosa

(Kelaart, 1858)

Carminodoris armata

Baba, 1993

Carminodoris bifurcata

Baba, 1993

Discodoris cebuensis

Bergh, 1877

Halgerda sp. 2

Homoiodoris japonica

Bergh, 1882

Sclerodoris apiculata

(Alder & Hancock, 1864)

Discodorididae sp. 3

Discodorididae sp. 2

Goniobranchus kuniei

(Pruvot-Fol, 1930)

Goniobranchus rufomaculatus

(Pease, 1871)

Chromodoris sp. 1

Glossodoris misakinosibogae

Baba, 1988

Hypselodoris kaname

Baba, 1994

Hypselodoris maculosa

(Pease, 1871)

Hypselodoris shimodaensis

Baba, 1994

Verconia alboannulata

(Rudman, 1986)

Diversidoris crocea

(Rudman, 1986)

Verconia nivalis

(Baba, 1937)

Verconia norba

(Er. Marcus & Ev. Marcus, 1970)

Dendrodoris carbunculosa

(Kelaart, 1858)

Dendrodoris coronata

Kay & D. K. Young, 1969

Dendrodoris tuberculosa

(Quoy & Gaimard, 1832)

Phyllidia exquisita

Brunckhorst, 1993

Phyllidia varicosa

Lamarck, 1801

Phyllidiopsis annae

Brunckhorst, 1993

Dermatobranchus albopunctulatus

Baba, 1976

Janolus tricellariodes

Pola & Gosliner, 2019

Janolus toyamensis

Baba & Abe, 1970

Marionia sp. 1

Samla bicolor

(Kelaart, 1858)

Eubranchus echizenicus

Baba, 1975

Eubranchus inabai

Baba, 1964

Eubranchus mimeticus

Baba, 1975

Cratena sp.11

Cratena affinis

(Baba, 1949)

Facelina quadrilineata

(Baba, 1930)

Sakuraeolis gerberina

Y. Hirano, 1999

Baeolidia japonica

Baba, 1933

Protaeolidiella atra

Baba, 1955

Tenellia pupillae

(Baba, 1961)

Tenellia sp.11

Eubranchus sp.11

Placida sp. 1

Goniobranchus aureopurpureus

(Collingwood, 1881)

Tergiposacca longicerata

Cella, Carmona, Ekimova, Chichvarkhin, Schepetov & Gosliner, 2016

Pelagella sp. 3

Elysia spp.

Gymnodoris spp.

Murphydoris adusta

Paz-Sedano, Smirnoff, Candás, Gosliner & Pola, 2022

Niparaya sp. 2

Avaldesia albomacula

(J. M. Chan & Gosliner, 2007)

Spinoaglaja sp. 1

Tenellia sp.13

Bulla sp. 1

Doridoidea spp.

Ardeadoris sp. 1

Facelinidae sp. 3

Tenellia sp.54

Tenellia sp.73

Pruvotfolia sp. 4

Halgerda labyrinthus

Donohoo & Gosliner, 2023

Thordisa sp. 9

Doto sp. 6

Murphydoris puncticulata

Paz-Sedano, Smirnoff, Candás, Gosliner & Pola, 2022

Tenellia sp. 7

Tambja sp. 1

Abronica sp. 4

Vellicolla muscaria

(A. A. Gould, 1859)

Goniodoridella sp.14

Vellicolla okamotoi

(Habe, 1952)

Bornella sp. 4

Doto sp.21

Tenellia sp.15

Phanerophthalmus anettae

Austin, Gosliner & Malaquias, 2018

Aplysia sp. 1

Aplysia japonica

G. B. Sowerby II, 1869

Lamprohaminoea sp. 4

Gymnodoris sp.31

Bursatella ocelligera

(Bergh, 1902)

Coryphellina pannae

Ekimova, Deart, Antokhina, Mikhlina & Schepetov, 2022

Goniodoridella sp.18

Biuve sp. 1

Ercolania annelyleorum

Wägele, Stemmer, Burghardt & Händeler, 2010