Sea Slugs in Otchogahama, Hachijo Island 297

Thecacera sp.10

Janolus sp.11

Janolus toyamensis

Baba & Abe, 1970

Hydatina physis

(Linnaeus, 1758)

Hypselodoris lacuna

Gosliner & R. F. Johnson, 2018

Tritonia sp. 4

Hexabranchus lacer

(Cuvier, 1804)

Trapania euryeia

Gosliner & Fahey, 2008

Actinocyclus verrucosus

Ehrenberg, 1831

Coryphellina sp. 2

Phestilla melanobrachia

Bergh, 1874

Diaphorodoris sp. 2

Eubranchus sp. 8

Tenellia sp.53

Pruvotfolia sp. 4

Tenellia sp.55

Bornella pele

Pola, Rudman & Gosliner, 2009

Thecacera pacifica

(Bergh, 1884)

Bornella anguilla

S. Johnson, 1984

Tyrannodoris luteolineata

(Baba, 1936)

Aegires exeches

Fahey & Gosliner, 2004

Aegires flores

Fahey & Gosliner, 2004

Aegires petalis

Fahey & Gosliner, 2004

Aegires citrinus

Pruvot-Fol, 1930

Aldisa zavorensis

Tibiriçá, Pola & Cervera, 2017

Hallaxa hileenae

Gosliner & S. Johnson, 1994

Chromodoris alcalai

Gosliner, 2021

Phyllidiella annulata

(J. E. Gray, 1853)

Phyllidiopsis cardinalis

Bergh, 1876

Phyllodesmium acanthorhinum

E. Moore & Gosliner, 2014

Doto purpurea

Baba, 1949

Kabeiro christianae

Shipman & Gosliner, 2015

Doridoidea spp.

Doriprismatica paladentata

(Rudman, 1986)

Dendrodoris sp. 3

Doridoidea sp.14

Hermania orca

(Gosliner, 1988)

Chelidonura hirundinina

(Quoy & Gaimard, 1833)

Notarchus indicus

Schweigger, 1820

Elysia sp.16

Berthellina delicata

(Pease, 1861)

Martadoris sp. 1

Halgerda dalanghita

Fahey & Gosliner, 1999

Halgerda diaphana

Fahey & Gosliner, 1999

Hiatodoris fellowsi

(Kay & D. K. Young, 1969)

Jorunna ramicola

M. C. Miller, 1996

Paradoris tsurugensis

Baba, 1986

Platydoris sp. 1

Rostanga orientalis

Rudman & Avern, 1989

Thordisa oliva

J. M. Chan & Gosliner, 2007

Glossodoris sp. 1

Hypselodoris sp.18

Hypselodoris kaname

Baba, 1994

Dendrodoris nigra

(W. Stimpson, 1855)

Madrella gloriosa

Baba, 1949

Marianina rosea

(Pruvot-Fol, 1930)

Launsina tanyae

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

Cratena sp.11

Phyllodesmium macphersonae

(Burn, 1962)

Aeolidiopsis ransoni

Pruvot-Fol, 1956

Tenellia diversicolor

(Baba, 1975)

Tenellia puellula

(Baba, 1955)

Tenellia sp. 5

Murphydoris sp. 4

Gymnodoris spp.

Phyllodesmium sp. 1

Phyllodesmium undulatum

E. Moore & Gosliner, 2014

Aeolidina sp. 2

Janolus sp. 6

Martadoris sp. 2

Tenellia sp.42

Ceratosoma bicolor

Baba, 1949

Tenellia sp. 7

Tenellia sp.72

Trinchesiidae sp. 1

Ceratodoris nakanoae

(Paz-Sedano & Pola, 2021)

Gymnodoris sp.27

Jorunna spp.

Discodorididae sp.22

Phyllodesmium sp. 8

Unknown Species

Tylodina sp. 1

Goniobranchus coi

(Risbec, 1956)

Tubulophilinopsis gardineri

(Eliot, 1903)

Chromodoris colemani

Rudman, 1982

Pleurobranchaea brockii

Bergh, 1897

Bornella stellifera

(A. Adams & Reeve, 1848)

Bulla ampulla

Linnaeus, 1758

Chelidonura amoena

Bergh, 1905

Gastropteridae sp. 2

Dolabrifera dolabrifera

(Rang, 1828)

Elysia sp. 2

Stiliger sp. 1

Umbraculum umbraculum

([Lightfoot], 1786)

Kaloplocamus acutus

Baba, 1949

Plocamopherus maculatus

(Pease, 1860)

Ancula kariyana

Baba, 1990

Ceratodoris kondoi

(Hamatani, 2001)

Ceratodoris nakamotoensis

(Hamatani, 2001)

Trapania palmula

Gosliner & Fahey, 2008

Aldisa albatrossae

Elwood, Á. Valdés & Gosliner, 2000

Aldisa pikokai

Bertsch & S. Johnson, 1982

Doris immonda

(Risbec, 1928)

Atagema intecta

(Kelaart, 1858)

Halgerda onna

Fahey & Gosliner, 2001

Halgerda willeyi

Eliot, 1904

Actinocyclus papillatus

(Bergh, 1878)

Hallaxa iju

Gosliner & S. Johnson, 1994

Goniobranchus albopunctatus

Garrett, 1879

Chromodoris sp. 1

Glossodoris cf. cincta

(Bergh, 1888)

Glossodoris rufomarginata

(Bergh, 1890)

Dendrodoris guttata

(Odhner, 1917)

Doriopsilla miniata

(Alder & Hancock, 1864)

Phyllidia exquisita

Brunckhorst, 1993

Phyllidia polkadotsa

Brunckhorst, 1993

Phyllidia larryi

(Brunckhorst, 1993)

Marioniopsis arborescens

(Bergh, 1890)

Samla bicolor

(Kelaart, 1858)

Samla riwo

(Gosliner & Willan, 1991)

Coryphellina lotos

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

Eubranchus sp. 1

Caloria indica

(Bergh, 1896)

Phyllodesmium poindimiei

(Risbec, 1928)

Tenellia sp. 2

Goniobranchus sp. 3

Pteraeolidia semperi

(Bergh, 1870)

Dermatobranchus sp. 3

Bornella hermanni

Angas, 1864

Avaldesia albomacula

(J. M. Chan & Gosliner, 2007)

Ancula sp.

Aldisa sp. 3

Tenellia sp.21

Aplustrum amplustre

(Linnaeus, 1758)

Tenellia sp.70

Discodorididae sp. 5

Eubranchus cf. leopoldoi

Caballer, Ortea & Espinosa, 2001

Pruvotfolia sp. 5

Doris tricolor

(Baba, 1938)

Abronica sp. 5

Produnga rubropunctata

(Edmunds, 1969)

Tritoniopsis sp. 1

Atagema sp. 7

Tenellia sp.24

Goniodoridella geminae

Paz-Sedano, Ekimova, Smirnoff, Gosliner & Pola, 2023

Marionia sp.13

Doridoidea sp.16

Phyllidiella pustulosa

(Cuvier, 1804)

Halgerda carlsoni

Rudman, 1978

Phyllidia willani

Brunckhorst, 1993

Diaphorodoris sp. 1

Babakina indopacifica

Gosliner, Gonzalez-Duarte & Cervera, 2007

Diniatys dentifer

(A. Adams, 1850)

Hamineobulla kawamurai

Habe, 1950

Haloa japonica

(Pilsbry, 1895)

Biuve fulvipunctata

(Baba, 1938)

Odontoglaja guamensis

Rudman, 1978

Siphopteron nigromarginatum

Gosliner, 1989

Lobiger viridis

Pease, 1863

Elysia obtusa

Baba, 1938

Elysia pusilla

(Bergh, 1872)

Thuridilla kathae

Gosliner, 1995

Thuridilla livida

(Baba, 1955)

Stiliger aureomarginatus

K. R. Jensen, 1993

Hermaea noto

(Baba, 1959)

Hermaea sp. 2

Pleurehdera sp. 1

Pleurobranchus peronii

Cuvier, 1804

Polycera sp. 7

Polycera risbeci

Odhner, 1941

Polycera sp. 1

Kaloplocamus dokte

Vallès & Gosliner, 2006

Kaloplocamus peludo

Vallès & Gosliner, 2006

Plocamopherus maculapodium

Valles & Gosliner, 2006

Roboastra gracilis

(Bergh, 1877)

Tambja amakusana

Baba, 1987

Martadoris limaciformis

(Eliot, 1908)

Bermudella japonica

(Baba, 1949)

Ceratodoris pilosa

(Bouchet & Ortea, 1983)

Okenia rhinorma

Rudman, 2007

Aegires incusus

Fahey & Gosliner, 2004

Aegires lemoncello

Fahey & Gosliner, 2004

Gymnodoris alba

(Bergh, 1877)

Gymnodoris impudica

(Rüppell & Leuckart, 1830)

Doriopsis pecten

(Collingwood, 1881)

Doris sugashimae

(Baba, 1998)

Carminodoris grandiflora

(Pease, 1860)

Tayuva lilacina

(A. A. Gould, 1852)

Halgerda albocristata

Gosliner & Fahey, 1998

Halgerda elegans

Bergh, 1905

Halgerda sp. 2

Jorunna funebris

(Kelaart, 1858)

Platydoris inornata

Dorgan, Á. Valdés & Gosliner, 2002

Platydoris sanguinea

Bergh, 1905

Rostanga sp. 2

Sclerodoris tuberculata

Eliot, 1904

Cadlinella ornatissima

(Risbec, 1928)

Ceratosoma sp. 1

Ceratosoma tenue

Abraham, 1876

Goniobranchus albonares

(Rudman, 1990)

Chromodoris aspersa

(A. A. Gould, 1852)

Goniobranchus decorus

(Pease, 1860)

Goniobranchus setoensis

(Baba, 1938)

Chromodoris willani

Rudman, 1982

Doriprismatica atromarginata

(Cuvier, 1804)

Glossodoris buko

S. B. Matsuda & Gosliner, 2018

Hypselodoris apolegma

(Yonow, 2001)

Hypselodoris bullockii

(Collingwood, 1881)

Hypselodoris maritima

(Baba, 1949)

Hypselodoris decorata

(Risbec, 1928)

Hypselodoris zephyra

Gosliner & R. F. Johnson, 1999

Verconia hongkongiensis

(Rudman, 1990)

Hypselodoris tryoni

(Garrett, 1873)

Thorunna florens

(Baba, 1949)

Dendrodoris carbunculosa

(Kelaart, 1858)

Dendrodoris krusensternii

(J. E. Gray, 1850)

Dendrodoris elongata

Baba, 1936

Dendrodoris fumata

(Rüppell & Leuckart, 1830)

Dendrodoris sp. 1

Ceratophyllidia sp. 1

Phyllidia elegans

Bergh, 1869

Phyllidia ocellata

Cuvier, 1804

Phyllidia picta

Pruvot-Fol, 1957

Phyllidia scottjohnsoni

Brunckhorst, 1993

Dermatobranchus fortunatus

(Bergh, 1888)

Dermatobranchus oculus

Gosliner & Fahey, 2011

Dermatobranchus striatellus

Baba, 1949

Janolus mirabilis

Baba & Abe, 1970

Notobryon bijecurum

Baba, 1937

Notobryon wardi

Odhner, 1936

Melibe papillosa

(de Filippi, 1867)

Tritonia sp. 1

Doto japonica

Odhner, 1936

Kabeiro sp. 2

Embletonia gracilis

Risbec, 1928

Eubranchus echizenicus

Baba, 1975

Cratena simba

Edmunds, 1970

Cratena sp. 2

Favorinus mirabilis

Baba, 1955

Favorinus tsuruganus

Baba & Abe, 1964

Moridilla brockii

Bergh, 1888

Phidiana anulifera

(Baba, 1949)

Phyllodesmium crypticum

Rudman, 1981

Sakuraeolis kirembosa

Rudman, 1980

Tenellia beta

(Baba & Abe, 1964)

Abronica purpureoanulata

(Baba, 1961)

Siphopteron sp. 2

Trapania tigger

Smirnoff, Donohoo & Gosliner, 2022

Pelagella albopunctata

Paz-Sedano, Smirnoff, Gosliner & Pola, 2023

Pelagella sp. 3

Tenellia nakapila

A. Y. Kim & Gosliner, 2024

Hypselodoris variobranchia

Gosliner & R. F. Johnson, 2018

Trapania sp. 7

Murphydoris adusta

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

Hallaxa sp. 1

Doto spp.

Facelinidae sp. 1

Phyllodesmium sp. 2

Anteaeolidiella takanosimensis

(Baba, 1930)

Elysia sp.10

Trapania sp.13

Tenellia sp.13

Phidiana sp. 1

Chromodorididae spp.

Gymnodoris sp.16

Eubranchus sp.14

Tenellia sp.54

Tenellia sp.73

Tenellia sp.39

Gastropteridae sp. 5

Janolus sp.13

Lomanotus sp. 5

Plocamopherus sp. 4

Coryphellina sp. 4

Sclerodoris faninozi

Innabi, Stout & Á. Valdés, 2023

Doridoidea sp. 3

Glossodoris sp. 3

Bornella sp. 4

Hermaea sp. 4

Hypselodoris sp. 6

Scyllaea pelagica

Linnaeus, 1758

Discodorididae spp.

Eubranchus sp.29

Placida barackobamai

McCarthy, Krug & Á. Valdés, 2017

Aglajidae sp. 5

Ercolania sp.10

Eubranchus sp.30

Gymnodoris bicolor

(Alder & Hancock, 1864)

Micromelo guamensis

(Quoy & Gaimard, 1825)

Diaphorodoris sp. 3

Hexabranchus sanguineus

(Rüppell & Leuckart, 1830)

Gymnodoris sp.36

Kaloplocamus sp. 6

Biuve sp. 1

Anteaeolidiella sp. 3

Martadoris sp. 3

Tubulophilinopsis sp. 2