Florent's Guide To The Florida, Bahamas &

Caribbean Reefs

Blue Glaucus
Glaucus atlanticus
Blue Glaucus
Category: Aeolid Nudibranchs
Scientific Name: Glaucus atlanticus
Size: Up to 1.5 in. (4 cm)  
Depth: 0-10 ft. (0-3 m)
Distribution: Circumtropical
Mollusca (Phylum)
└Gastropoda (Class)
 └Heterobranchia (Subclass)
  └Euthyneura (Infraclass)
   └Nudibranchia (Order)
    └Cladobranchia (Suborder)
     └Aeolidioidea (Superfamily)
      └Glaucidae (Family)
       └Glaucus (Genus)

Sea Slugs
Aeolid Nudibranchs

Blue Glaucus

Purple-Ring Nudibranch

Flabellina engeli



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© 2025 Florent Charpin