Sea Slugs - Nudibranchs of California

While land slugs are slimy and eat your vegetables, sea slugs are colorful and awesome. And we have a bunch of them in California. Hooray. This guide currently covers the common nudibranchs, sea hares, sapsucking slugs, and other marine Heterobranchia of our coast, including several non-native ...more ↓

Hammerhead Doto 2
Doto amyra
British Columbia Doto 3
Doto columbiana
Dark Doto 3
Doto kya
Lance's Doto 4
Doto lancei
White Dendronotus 5
Dendronotus albus
Rainbow Nudibranch 6
Dendronotus iris
Stubby Frond-aeolis 3
Dendronotus subramosus
Branched Dendronotus 8
Dendronotus venustus
Hancock's Nudibranch 3
Hancockia californica
Lion's Mane Nudibranch 3
Melibe leonina
Goddard's Aeolid 9
Pacifia goddardi
Homely Aeolid 12
Eubranchus rustyus
Misaki Aeolid 4
Leostyletus misakiensis
Rose-pink Cuthona 1
Cuthona divae
Hamann's Aeolid 4
Cuthona hamanni
Lake Merritt Cuthona 5
Cuthona perca
Phoenix Aeolid 3
Cuthona phoenix
Roller's Aeolid 13
Cuthona rolleri
Chocolate Aeolid 1
Cuthonella cocoachroma
Doc's Aeolid 12
Catriona rickettsi
Lagoon Sea Slug 4
Tenellia adspersa
White-crusted Aeolid 4
Tenellia albocrusta
British Columbia Aeolid 3
Tenellia columbiana
Yellow-head Aeolid 1
Tenellia flavovulta
Green Aeolid
Trinchesia virens
Shiny Aeolid 1
Zelentia fulgens
Laguna Beach Aeolid 1
Diaphoreolis lagunae
Vrijenhoek's Nudibranch
Ziminella vrijenhoeki
Smooth-tooth Aeolis 4
Apata pricei
Graceful Aeolid 4
Abronica abronia
Cooper's Aeolid 14
Orienthella cooperi
Three-lined Aeolid 3
Orienthella trilineata
Hilton's Aeolid 6
Phidiana hiltoni
Morro Bay Aeolid 16
Emarcusia morroensis
Stearns' Aeolid 17
Austraeolis stearnsi
Red-Headed Aeolid 18
Noumeaella rubrofasciata
Enosima Aeolid 3
Sakuraeolis enosimensis
Undertaker Nudibranch
Aeolidia libitinaria
Shaggy Mouse Nudibranch 19
Aeolidia papillosa
Colorful Aeolid 3
Aeolidiella chromosoma
Single-stalk Aeolis 3
Babakina festiva
Spanish Shawl 4
Flabellinopsis iodinea
Thick-horned Nudibranch 4
Hermissenda crassicornis
Opalescent Nudibranch 3
Hermissenda opalescens
White-lined Dirona 3
Dirona albolineata
Colorful Dirona 3
Dirona picta
Ringed Janolus 17
Janolus anulatus
Cockscomb Nudibranch 4
Antiopella barbarensis
Black Tiger Nudibranch
Tritonia nigritigris
Giant Orange Tochui 23
Tochuina tetraquetra
Red Dorid 3
Rostanga pulchra
Heath's Dorid 12
Geitodoris heathi
O'Donoghue's Dorid 4
Diaulula odonohuei
San Diego Dorid 4
Diaulula sandiegensis
Mimic Dorid 4
Baptodoris mimetica
Hunchback Doris 20
Atagema alba
Mulliner's Dorid 18
Peltodoris mullineri
Sea Lemon 3
Peltodoris nobilis
Leopard Jorunna 25
Jorunna pardus
Two-spotted Dorid 4
Thordisa bimaculata
Red Thordisa 18
Thordisa rubescens
Monterey Dorid 3
Doris montereyensis
Picken's Dorid 17
Doris pickensi
White Dorid 4
Conualevia alba
Salt-and-pepper Doris 3
Aegires albopunctatus
Flat Okenia 4
Okenia plana
Hopkin's Rose 27
Okenia rosacea
Gosliner's Trapania 4
Trapania goslineri
Brown Horned Dorid 29
Acanthodoris brunnea
Hudson's Horned Dorid 5
Acanthodoris hudsoni
Orange-peel Doris 30
Acanthodoris lutea
Nanaimo Horned Dorid 31
Acanthodoris nanaimoensis

Edited by Ken-ichi Ueda and Robin Gwen Agarwal, some rights reserved (CC BY-SA)

Photo Credits

  • 1. (c) Ken-ichi Ueda, some rights reserved (CC BY)
  • 2. (c) Robin Gwen Agarwal, all rights reserved, uploaded by Robin Gwen Agarwal
  • 3. (c) Robin Agarwal (ANudibranchMom on iNaturalist), some rights reserved (CC BY-NC)
  • 4. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal
  • 5. (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda
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  • 10. (c) Craig Hoover, some rights reserved (CC BY-NC), uploaded by Craig Hoover
  • 11. (c) Jeff Goddard, some rights reserved (CC BY-NC), uploaded by Jeff Goddard
  • 12. (c) Robin Agarwal, some rights reserved (CC BY-SA)
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  • 17. (c) Jeff Goddard, some rights reserved (CC BY-NC)
  • 18. (c) Phil Garner, all rights reserved, uploaded by Phil Garner
  • 19. (c) Stefan, some rights reserved (CC BY-NC), uploaded by Stefan
  • 20. (c) Gary McDonald, some rights reserved (CC BY-NC), uploaded by Gary McDonald
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  • 25. (c) Brenna Green, some rights reserved (CC BY-NC-ND), uploaded by Brenna Green
  • 26. (c) Robert H. Lee, some rights reserved (CC BY)
  • 27. (c) Ken-ichi Ueda, some rights reserved (CC BY-NC)
  • 28. (c) Ken Bondy, some rights reserved (CC BY-NC-SA)
  • 29. (c) Ken-ichi Ueda, some rights reserved (CC BY-NC-SA)
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