All the Nudibranchs & Sea Slugs of Bermuda

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Every sea slug species with a documented record from Bermuda: nudibranchs, sea hares, sap-sucking slugs and their relatives. Most are small and well camouflaged, so you will need to look closely.

Source: species recorded in Bermuda in GBIF (the Global Biodiversity Information Facility: museum specimens, scientific surveys and verified sightings), with every name checked against the World Register of Marine Species (WoRMS); land and freshwater species, fossils and out-of-date names have been removed. Compiled October 2026. Click a scientific name for its WoRMS page, or a record count to see the Bermuda records. A few old records may be misidentifications.

Jump to: Nudibranchs  |  Sea hares  |  Sap-sucking sea slugs  |  Side-gilled sea slugs  |  Umbrella slugs  |  Headshield slugs and bubble snails  |  Runcinid sea slugs

Key: protected protected by Bermuda law (Department of Environment list: Protected Species Act 2003 and Fisheries (Protected Species) Order 1978)   in our photo guide

103 species

Nudibranchs (33)

Common nameScientific nameBermuda records
Aegiridae
–Aegires corrugatus4
–Aegires ortizi5
Aeolidiidae
–Anteaeolidiella lurana3
–Berghia agari1
Neapolitan SpurillaSpurilla neapolitana1
Sargassum SpurillaSpurilla sargassicola3
Chromodorididae
Zebra Sea Goddessin our photo guideFelimare zebra108
Bill Clench's dorisFelimida clenchi1
Discodorididae
Brown-speckled AphelodorisAphelodoris antillensis10
Fuzzy RostangaRostanga byga3
Spotted Foot NudibranchTayuva lilacina1
Dorididae
–Doris bovena2
Dotidae
–Doto pygmaea1
Facelinidae
–Facelina goslingii2
Long-eared Favorinusin our photo guideFavorinus auritulus10
Eveline's LearchisLearchis evelinae6
Christmas Tree Hydroid NudibranchLearchis poica1
Frosty NoumeaellaNoumeaella kristenseni2
Fionidae
FionaFiona pinnata3
Flabellinidae
Dushia FlabellinaEdmundsella dushia2
Glaucidae
Blue Glaucusin our photo guideGlaucus atlanticus2
Goniodorididae
–Bermudella zoobotryon19
White-V TrapaniaTrapania dalva5
Myrrhinidae
Western Dondicein our photo guideDondice occidentalis25
Onchidorididae
–Lamellidoris lactea1
–Onchidoris olivacea1
Polyceridae
Odhner's PolyceraPolycera odhneri1
–Polycerella emertoni1
Scyllaeidae
Daedalus' NudibranchCrosslandia daedali1
Sargassum NudibranchScyllaea pelagica32
Tritoniidae
Hamner's TritoniaTritonicula hamnerorum24
Well's TritoniaTritonicula wellsi6
Tufted TritoniopsisTritoniopsis frydis2

Sea hares (9)

Common nameScientific nameBermuda records
Aplysiidae
mottled seahareAplysia brasiliana4
Spotted Seaharein our photo guideAplysia dactylomela110
sooty seahareAplysia morio4
Pygmy SeahareAplysia parvula1
–Aplysia tarda1
–Dolabrifera ascifera1
–Dolabrifera virens1
longtail seacatStylocheilus longicauda1
Lined sea hareStylocheilus polyomma1

Sap-sucking sea slugs (23)

Common nameScientific nameBermuda records
Caliphyllidae
Spotted SacoglossanCaliphylla mediterranea3
Antilles glass-slugCyerce antillensis2
Costasiellidae
–Costasiella nonatoi1
Eyespot costasiellain our photo guideCostasiella ocellifera112
Cylindrobullidae
–Cylindrobulla gigas2
Juliidae
Caribbean bivalved snailEdenttellina caribbea3
Limapontiidae
Dusky stiligerErcolania fuscata9
–Ercolania selva1
Oxynoidae
Antilles oxynoeOxynoe antillarum7
Olivaceous Bubble SnailOxynoe olivacea1
Plakobranchidae
–Bosellia mimetica21
Horned SapsuckerElysia cornigera31
yellow elysiaElysia flava3
–Elysia jibacoaensis3
–Elysia nisbeti1
Ornate Elysiain our photo guideElysia ornata13
Papillose elysiaElysia papillosa59
–Elysia pawliki3
Brown-lined Elysiain our photo guideElysia subornata77
–Elysia velutinus23
Zuleica's ElysiaElysia zuleicae28
Painted ElysiaThuridilla picta6
Volvatellidae
–Volvatella bermudae21

Side-gilled sea slugs (2)

Common nameScientific nameBermuda records
Pleurobranchidae
Atlantic sidegill slugPleurobranchus areolatus3
–Pleurobranchus verrilli1

Umbrella slugs (2)

Common nameScientific nameBermuda records
Tylodinidae
–Tylodina americana3
Umbraculidae
Atlantic Umbrella SlugUmbraculum umbraculum3

Headshield slugs and bubble snails (33)

Common nameScientific nameBermuda records
Acteonidae
–Acteon candens1
–Acteon melampoides2
–Acteon splendidulus1
Pitted Baby-bubbleJaponactaeon punctostriatus9
Aglajidae
–Camachoaglaja berolina29
swallowtail aglajaChelidonura hirundinina1
–Spinoaglaja petra1
Aplustridae
Brown-line PaperbubbleHydatina vesicaria2
Miniature MeloMicromelo undatus11
Bullidae
–Bulla bermudae3
Common West Indian BubbleBulla occidentalis34
–Bulla punctulata1
Striate BubbleBulla striata38
Cylichnidae
–Cylichna verrillii1
Haminoeidae
Caribbean glassy-bubbleAtys caribaeus1
–Atys riiseanus1
Antilles glassy-bubbleHaminoea antillarum8
Elegant Glassy-BubbleHaminoea elegans16
straight glassy-bubbleHaminoea petitii2
amber glassy-bubbleHaminoea succinea4
MacAndrew's Glassy-bubbleWeinkauffia macandrewii2
Philinidae
crenulate paperbubblePhiline sagra1
Retusidae
Engraved Barrel-BubblePyrunculus caelatus2
sulcate barrel-bubbleRetusa sulcata1
Rhizoridae
Southern Spindle-BubbleVolvulella persimilis1
Ringiculidae
–Ringicula peracuta2
Tornatinidae
–Acteocina bermudensis3
Striate Barrel-BubbleActeocina bullata1
Channeled Barrel-bubbleActeocina canaliculata4
Cande's Barrel-bubbleActeocina candei5
–Acteocina decurrens11
–Acteocina liratispira2
straight barrel-bubbleActeocina recta1

Runcinid sea slugs (1)

Common nameScientific nameBermuda records
Runcinidae
–Runcina inconspicua1