Order

Common name: Nudibranchs

Scientific name: Nudibranchia

Nudibranchs, often referred to as sea slugs, are a diverse group of colorful and striking gastropods known for their intricate shapes and patterns. They lack a protective shell, which is unusual for gastropods. Nudibranchs are popular in the reefkeeping hobby for their aesthetic appeal and their role in controlling certain pests, such as aiptasia. They exhibit a variety of feeding habits, from sponges to hydroids, and some even display kleptoplasty, where they incorporate photosynthetic material from their prey into their own tissues. Care should be taken when introducing them to an aquarium, as they have specific dietary needs and may not thrive without their preferred food sources.

  1. A banana nudibranch (Aegires minor) is slowly crawling across the seabed, Raja Ampat, Indonesia, Asia
    Common name: A nudibranch
    Scientific name: Aegires minor
  2. Gray Norse God Nudibranch, Aegires serenae
    Common name: Green and black gill guard slug
    Scientific name: Aegires serenae
  3. Common name: Aldisa barlettai
    Scientific name: Aldisa barlettai
  4. Ardeadoris Nudibranch
    Common name: Ardeadoris egretta
    Scientific name: Ardeadoris egretta
  5. Clumpy Nudibranch,Asteronotus cespitosus, Kona Hawaii.
    Common name: Nudibranch
    Scientific name: Asteronotus cespitosus
  6. Close-up of a beautiful mediterranean nudibranch or anemone seaslug (Berghia coerulescens)
    Common name: Berghia Nudibranch
    Scientific name: Berghia stephanieae
  7. Cadlinella Nudibranch
    Common name: A nudibranch
    Scientific name: Cadlinella ornatissima
  8. Tropical nudibranch Indian Caloria (Caloria indica) on the reef. Raja Ampat
    Common name: Indian Caloria
    Scientific name: Caloria indica
  9. Nudibranch
    Common name: purple-edged ceratosoma
    Scientific name: Ceratosoma tenue
  10. A nudibranch (sea slug) - Ceratosoma trilobatum living together with Emperor shrimp - Zenopontonia rex. Underwater macro world of Tulamben, Bali, Indonesia.
    Common name: trilobate ceratosoma
    Scientific name: Ceratosoma trilobatum
  11. Chromodoris annae nudibranch crawling on the coral reef
    Common name: Anna's Chromodoris
    Scientific name: Chromodoris annae
  12. Common name: Chromodoris aspersa
    Scientific name: Chromodoris aspersa
  13. Nudibranch
    Common name: Diana's Chromodoris
    Scientific name: Chromodoris dianae
  14. Chromodoris elisabethina
    Common name: elisabeth's chromodoris
    Scientific name: Chromodoris elisabethina
  15. Chromodoris leopardus, Nudibranch, Sea Slug
    Common name: leopard chromodoris
    Scientific name: Chromodoris leopardus
  16. Chromodoris lochi Nudibranch
    Common name: loch's chromodoris
    Scientific name: Chromodoris lochi
  17. Close-up of a Magnificent Chromodoris (Chromodoris magnifica). Padang Bai, Bali, Indonesia
    Common name: Magnificent Chromodoris
    Scientific name: Chromodoris magnifica
  18. Chromodoris michaeli nudibranch Cebu Philippines
    Common name: Michael's Nudibranch
    Scientific name: Chromodoris michaeli
  19. A Chromodoris Quadricolor nudibranch crawling on sand Boracay Island Philippines
    Common name: pyjama slug
    Scientific name: Chromodoris quadricolor
  20. Chromodoris strigata
    Common name: Strigate Chromodoris
    Scientific name: Chromodoris strigata
  21. Chromodoris Nudibranch
    Common name: willan's chromodoris
    Scientific name: Chromodoris willani
  22. Common name: Crimora lutea
    Scientific name: Crimora lutea
  23. Discodoris boholiensis Nudibranch
    Common name: bohol discodoris
    Scientific name: Discodoris boholiensis
  24. Doriprismatica atromarginata Nudibranch
    Common name: Black-margined Doriprismatica
    Scientific name: Doriprismatica atromarginata
  25. nudibranch Doriprismatica stellata
    Common name: Starry Nudibranch
    Scientific name: Doriprismatica stellata
  26. Common name: crown doto
    Scientific name: Doto coronata
  27. Flabellina Exoptata nudibranch  crawls on corals of Bali, Indonesia
    Common name: much-desired flabellina
    Scientific name: Flabellina exoptata
  28. Nudibranch laying Eggs
    Common name: purple aeolis
    Scientific name: Flabellina iodinea
  29. Nudibranquio en el fondo marino, mar mediterraneo.
    Common name: striped flabellina
    Scientific name: Flabellina lineata
  30. Flabellina  rubrolineata
    Common name: red-lined flabellina
    Scientific name: Flabellina rubrolineata
  31. Glossodoris cincta (Lat) 
Nudibranch mollusk. Banded glossodoris
Margin glossodoris .
    Common name: A nudibranch
    Scientific name: Glossodoris cincta
  32. Nudibranch glossodoris ( Glossodoris hikuerensis ) crawling on coral reef of Bali, Indonesia
    Common name: hikuero glossodoris
    Scientific name: Glossodoris hikuerensis
  33. Glossodoris pallida Nudibranch
    Common name: Pallid glossodoris
    Scientific name: Glossodoris pallida
  34. Glossodoris rufomarginata Nudibranch, Sea Slug
    Common name: brown margin glossodoris
    Scientific name: Glossodoris rufomarginata
  35. White Spotted Nudibranch (Goniobranchus albopunctatus) on coral reef, Maui; Hawaii, United States of America
    Common name: Goniobranchus albopunctatus
    Scientific name: Goniobranchus albopunctatus
  36. Common name: Goniobranchus alius
    Scientific name: Goniobranchus alius
  37. Chromodoris annulata EG-16
    Common name: Ringed chromodoris
    Scientific name: Goniobranchus annulatus
  38. Gold-spotted Chromodorid slug
    Common name: Purple-Edged Ceratosoma
    Scientific name: Goniobranchus aureopurpureus
  39. Goniobranchus coi - nudibranch (sea slug) feeding on a sponge. Underwater macro world of Tulamben, Bali, Indonesia.
    Common name: co's goniobranchus
    Scientific name: Goniobranchus coi
  40. Collingwood's Goniobranchus Goniobranchus collingwoodi
    Common name: Collingwood's Chromodoris
    Scientific name: Goniobranchus collingwoodi
  41. A pair of Goniobranchus fidelis nudibranch
    Common name: Reliable Goniobranchus
    Scientific name: Goniobranchus fidelis
  42. Twin chromodoris showing off its impressive colors - 
Goniobranchus geminus
    Common name: Twin Goniobranchus
    Scientific name: Goniobranchus geminus
  43. Goniobranchus geometricus
    Common name: goemetric goniobranchus
    Scientific name: Goniobranchus geometricus
  44. Goniobranchus hintuanensis Nudibranch
    Common name: lumpy goniobranchus
    Scientific name: Goniobranchus hintuanensis
  45. Goniobranchus kuniei
    Common name: Kuni's nudibranch
    Scientific name: Goniobranchus kuniei
  46. Reticulated Chromodoris (Goniobranchus reticulatus or Chromodoris reticulata) nudibranch or sea slug at Little Lembeh II dive site in Sogod Bay, Southern Leyte, Philippines.
    Common name: red-netted goniobranchus
    Scientific name: Goniobranchus reticulatus
  47. Goniobranchus tinctorius Nudibranch
    Common name: red-netted goniobranchus
    Scientific name: Goniobranchus tinctorius
  48. Goniobranchus tritos in Maldives
    Common name: Nudibranch
    Scientific name: Goniobranchus tritos
  49. Common name: angled doris
    Scientific name: Goniodoris nodosa
  50. Gymnodoris ceylonica Nudibranch
    Common name: Red spotted transluscent slug
    Scientific name: Gymnodoris ceylonica
  51. Halgerda Batangas, Lembeh Strait, Indonesia
    Common name: batangas halgerda
    Scientific name: Halgerda batangas
  52. Halgerda carlsoni is a species of sea slug
    Common name: Halgerda carlsoni
    Scientific name: Halgerda carlsoni
  53. Halgerda willeyi Eliot, 1903
パイナップルウミウシ
    Common name: willey's halgerda
    Scientific name: Halgerda willeyi
  54. Spanish Dancer, Dorid Nudibranch (Hexabranchus sanguineus)
    Common name: Spanish dancer
    Scientific name: Hexabranchus sanguineus
  55. Three robe hem hypselodoris nudibranch (Hypselodoris apolegma) near Anilao, Philippines.  Underwater photography and travel.
    Common name: Giant hypselodoris
    Scientific name: Hypselodoris apolegma
  56. Bullock's Hypselodoris (hypselodoris bullockii), a sea slug, a dorid nudibranch on a coral reef near Anilao, Mabini,  Philippines.  Underwater photography and travel.
    Common name: Bullocks Hypselodoris
    Scientific name: Hypselodoris bullockii
  57. Nudibranch - Hypselodoris kanga
    Common name: Kanga Hypselodoris
    Scientific name: Hypselodoris kanga
  58. Nudibranchs - sea slugs - Hypselodoris cf. maculosa mating. Underwater macro life of Tulamben, Bali, Indonesia.
    Common name: spotted hypselodoris
    Scientific name: Hypselodoris maculosa
  59. Hypselodoris pulchella
    Common name: beautiful hypselodoris
    Scientific name: Hypselodoris pulchella
  60. Closeup shot of a marine gastropod called Hypselodoris tryoni against the corals
    Common name: tryon's hypselodoris
    Scientific name: Hypselodoris tryoni
  61. Funeral Jorunna (Jorunna funebris), or dotted nudibranch, a sea slug, dorid nudibranch at Santa Sofia I dive site in Sogod Bay, Southern Leyte, Philippines.  Underwater photography and travel.
    Common name: Sea Slug
    Scientific name: Jorunna funebris
  62. Nudibranch (sea slug) - Jorunna rubescens laying eggs. Underwater macro world of Tulamben, Bali, Indonesia.
    Common name: red-lined jorunna
    Scientific name: Jorunna rubescens
  63. Common name: Limenandra Nodosa
    Scientific name: Limenandra nodosa
  64. Common name: Marie's Mexichromis
    Scientific name: Mexichromis mariei
  65. Nudibranch (sea slug) - Mexichromis multituberculata feeding on a sponge. Underwater macro world of Tulamben, Bali, Indonesia.
    Common name: Beau Vallon magnificent slug
    Scientific name: Mexichromis multituberculata
  66. Colorful rainbow colored ceratosoma nudibranch -Miamira sinuata
    Common name: jolly gree giant
    Scientific name: Miamira sinuata
  67. Nembrotha cristata (Crested nembrotha) on colored coral
    Common name: crested nembrotha
    Scientific name: Nembrotha cristata
  68. A Nembrotha Lineolata nudibranch crawling on a wreck Boracay Island Philippines
    Common name: lined nembrotha
    Scientific name: Nembrotha lineolata
  69. Nembrotha Nudibranch Red Sea, Nembrotha-megalocera
    Common name: bighorn nembrotha
    Scientific name: Nembrotha megalocera
  70. Nudibranch nembrotha purpureolineata
    Common name: purple-lined nembrotha
    Scientific name: Nembrotha purpureolineata
  71. Nembrotha yonowae ( a species of colorful sea slugs , dorid nudibranch, marine gastropod mollusk in the family of Polyceridae ) feeding on corals of Bali, Indonesia
    Common name: Nembrotha yonowae
    Scientific name: Nembrotha yonowae
  72. Common name: Phestilla lugubris
    Scientific name: Phestilla lugubris
  73. Aeolid nudibranch with scientific name Tenellia melanobrachia
    Common name: black gilled phestilla
    Scientific name: Phestilla melanobrachia
  74. Common name: Phyllidia babai
    Scientific name: Phyllidia babai
  75. Phyllidia coelestis
    Common name: Celestial Phyllidia
    Scientific name: Phyllidia coelestis
  76. An Elegant Phyllidia (Phyllidia Elegans)
    Common name: elegant Phyllidia
    Scientific name: Phyllidia elegans
  77. Phyllidia exquisita nudibranch, Indo-west Pacific waters, grows to 50mm, Philippines
    Common name: Phyllidia exquisita
    Scientific name: Phyllidia exquisita
  78. Sea slug - Phyllidia picta on the sea bottom. Underwater macro life of Tulamben, Bali, Indonesia.
    Common name: Blue nudibranch
    Scientific name: Phyllidia picta
  79. Nudibranch - Phyllidia varicosa
    Common name: varicose Phyllidia
    Scientific name: Phyllidia varicosa
  80. Front view of a Phyllidiella pustulosa nudibranch on corals Cebu Philippines
    Common name: Pustulose wart slug
    Scientific name: Phyllidiella pustulosa
  81. Phyllidiella Rosans - Sea Slug - Nudibranch
    Common name: rose Phyllidiella
    Scientific name: Phyllidiella rosans
  82. Common name: Anna's Phyllidiopsis
    Scientific name: Phyllidiopsis annae
  83. Nudibranch Phyllidiopsis pipeki
    Common name: Phyllidiopsis pipeki
    Scientific name: Phyllidiopsis pipeki
  84. Phyllidiopsis shireenae in Maldives
    Common name: Shireen's Phyllidiopsis
    Scientific name: Phyllidiopsis shireenae
  85. Yellow-Tipped Phyllodesmium (Phyllodesmium briareum) a sea slug or an aeolid nudibranch in the family Facelinidae near Anilao, Mabini,  Philippines.  Underwater photography.
    Common name: Solar Powered Nudibranch
    Scientific name: Phyllodesmium briareum
  86. Solar powered nudi Phyllodesmium longicirrum
    Common name: Solar-powered Phyllodesmium
    Scientific name: Phyllodesmium longicirrum
  87. Phyllodesmium magnum Nudibranch, Sea Slag. Philippines.
    Common name: Great Phyllodesmium
    Scientific name: Phyllodesmium magnum
  88. Common name: Flat peach slug
    Scientific name: Platydoris formosa
  89. Polycera quadrilineata
    Common name: Four-lined Nudibranch
    Scientific name: Polycera quadrilineata
  90. Pteraeolidia ianthina - Nacktschnecke im Komodo Nationalpark Indonesien
    Common name: blue dragon nudibranch
    Scientific name: Pteraeolidia ianthina
  91. Reticulidia fungia is a species of sea slug
    Common name: Halgerda batangas
    Scientific name: Reticulidia fungia
  92. Halgerda Reticulidia (reticulidia halgerda) a sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk on a sandy bottom near Anilao, Philippines.  Underwater photography and travel.
    Common name: reticulated wart slug
    Scientific name: Reticulidia halgerda
  93. Macro underwater shot of the nudibranch ''Roboastra gracilis'', a sea slug found in Similan Island, Thailand.
    Common name: slender roboastra
    Scientific name: Roboastra gracilis
  94. Limace de mer Spurilla neapolitana
    Common name: neapolitan spurilla
    Scientific name: Spurilla neapolitana
  95. Gloomy Nudibranch (Tambja morosa)
    Common name: Gloomy Nudibranch
    Scientific name: Tambja morosa
  96. Painted Thecacera (Thecacera picta), Derawan Island, Indonesia
    Common name: Painted Thecacera
    Scientific name: Thecacera picta
  97. Common name: Tritoniopsis elegans
    Scientific name: Tritoniopsis elegans
  98. Common name: Red-spotted Nudibranch
    Scientific name: Vayssierea felis