Sea Slugs in Mini Dream Hole, Okinawa Island (Onna and Yomitan area) | SEASLUG.WORLD

Shooting Location

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Best Time to Dive in Mini Dream Hole

99

Total Observations

20.0°C - 29.0°C

Water Temperature Range

Jun , Feb , Apr

Peak Season

55

Peak Observations

Monthly Diving Activity & Water Temperature

Observations Water Temperature Higher bars indicate peak diving activity

Planning Your Dive Trip

Best for beginners: Peak Activity season (peak activity)
Water temperature: 20.0°C - 29.0°C range

Peak observations: 55 in Peak Activity
Year-round diving: 99 total observations recorded

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Chromodoris colemani

Chromodoris colemani

Rudman, 1982

Reticulidia fungia

Reticulidia fungia

Brunckhorst & Gosliner, 1993

Cadlinella ornatissima

Cadlinella ornatissima

(Risbec, 1928)

Phyllidiidae sp. 1

Phyllidiidae sp. 1

Janolus sp. 2

Janolus sp. 2

Facelinidae sp.11

Facelinidae sp.11

Tritonia bollandi

Tritonia bollandi

V. G. Smith & Gosliner, 2003

Halgerda diaphana

Halgerda diaphana

Fahey & Gosliner, 1999

Goniobranchus sp. 1

Goniobranchus sp. 1

Verconia sp. 4

Verconia sp. 4

Thorunna furtiva

Thorunna furtiva

Bergh, 1878

Phyllidia elegans

Phyllidia elegans

Bergh, 1869

Tomoberthella martensi

Tomoberthella martensi

(Pilsbry, 1896)

Phyllidiella pustulosa

Phyllidiella pustulosa

(Cuvier, 1804)

Bornella anguilla

Bornella anguilla

S. Johnson, 1984

Hermania orca

Hermania orca

(Gosliner, 1988)

Odontoglaja sp. 1

Odontoglaja sp. 1

Gastropteron sp. 3

Gastropteron sp. 3

Sagaminopteron ornatum

Sagaminopteron ornatum

Tokioka & Baba, 1964

Siphopteron tigrinum

Siphopteron tigrinum

Gosliner, 1989

Cyerce kikutarobabai

Cyerce kikutarobabai

Hamatani, 1976

Costasiella sp. 1

Costasiella sp. 1

Berthellina delicata

Berthellina delicata

(Pease, 1861)

Kaloplocamus peludo

Kaloplocamus peludo

Vallès & Gosliner, 2006

Naisdoris liklik

Naisdoris liklik

(Gosliner, 2004)

Trapania naeva

Trapania naeva

Gosliner & Fahey, 2008

Aegires flores

Aegires flores

Fahey & Gosliner, 2004

Notodoris citrina

Notodoris citrina

Bergh, 1875

Aldisa zavorensis

Aldisa zavorensis

Tibiriçá, Pola & Cervera, 2017

Halgerda brunneomaculata

Halgerda brunneomaculata

Carlson & Hoff, 1993

Halgerda elegans

Halgerda elegans

Bergh, 1905

Halgerda onna

Halgerda onna

Fahey & Gosliner, 2001

Halgerda tessellata

Halgerda tessellata

(Bergh, 1880)

Platydoris sanguinea

Platydoris sanguinea

Bergh, 1905

Discodorididae sp. 2

Discodorididae sp. 2

Hallaxa hileenae

Hallaxa hileenae

Gosliner & S. Johnson, 1994

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Ardeadoris egretta

Ardeadoris egretta

Rudman, 1984

Goniobranchus fidelis

Goniobranchus fidelis

(Kelaart, 1858)

Goniobranchus leopardus

Goniobranchus leopardus

(Rudman, 1987)

Chromodoris willani

Chromodoris willani

Rudman, 1982

Mexichromis pusilla

Mexichromis pusilla

(Bergh, 1874)

Ardeadoris averni

Ardeadoris averni

(Rudman, 1985)

Ardeadoris symmetrica

Ardeadoris symmetrica

(Rudman, 1990)

Diversidoris flava

Diversidoris flava

(Eliot, 1904)

Verconia romeri

Verconia romeri

(Risbec, 1928)

Thorunna purpuropedis

Thorunna purpuropedis

Rudman & S. Johnson, 1985

Phyllidiopsis sphingis

Phyllidiopsis sphingis

Brunckhorst, 1993

Dermatobranchus albus

Dermatobranchus albus

(Eliot, 1904)

Dermatobranchus fortunatus

Dermatobranchus fortunatus

(Bergh, 1888)

Dermatobranchus fasciatus

Dermatobranchus fasciatus

Gosliner & Fahey, 2011

Notobryon bijecurum

Notobryon bijecurum

Baba, 1937

Hancockia sp. 2

Hancockia sp. 2

Marionia sp. 1

Marionia sp. 1

Cratena sp. 1

Cratena sp. 1

Pruvotfolia sp. 3

Pruvotfolia sp. 3

Tenellia beta

Tenellia beta

(Baba & Abe, 1964)

Tenellia ornata

Tenellia ornata

(Baba, 1937)

Tenellia sp.11

Tenellia sp.11

Phestilla melanobrachia

Phestilla melanobrachia

Bergh, 1874

Trapania tigger

Trapania tigger

Smirnoff, Donohoo & Gosliner, 2022

Goniobranchus sp. 3

Goniobranchus sp. 3

Tergiposacca longicerata

Tergiposacca longicerata

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

Chromodoris sp. 3

Chromodoris sp. 3

Paradoris sp. 4

Paradoris sp. 4

Aegires sp. 1

Aegires sp. 1

Marionia sp. 2

Marionia sp. 2

Phyllidiidae spp.

Phyllidiidae spp.

Coryphellina sp. 1

Coryphellina sp. 1

Janolus sp. 7

Janolus sp. 7

Hermaea sp. 3

Hermaea sp. 3

Tritoniidae spp.

Tritoniidae spp.

Janolus sp.13

Janolus sp.13

Tenellia sp.43

Tenellia sp.43

Pelagella sp. 8

Pelagella sp. 8

Verconia laboutei

Verconia laboutei

(Rudman, 1986)

Phanerophthalmus anettae

Phanerophthalmus anettae

Austin, Gosliner & Malaquias, 2018

Eubranchus sp.36

Eubranchus sp.36

Janolus sp.20

Janolus sp.20

Eubranchus sp.37

Eubranchus sp.37

Hantazuia imagawai

Hantazuia imagawai

Korshunova, Fletcher & Martynov, 2025

Phyllodesmium sp. 8

Phyllodesmium sp. 8