Glaucus marginatus

Glaucus marginatus
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Nudibranchia
Suborder: Aeolidacea
Family: Glaucidae
Genus: Glaucus
Species:
G. marginatus
Binomial name
Glaucus marginatus
(Reinhardt & Bergh, 1864)
Synonyms
  • Glaucilla briarea (Reinhardt & Bergh, 1864)
  • Glaucilla marginata (Reinhardt & Bergh, 1864) (original combination)

Glaucus marginatus is a species of small, floating, blue sea slug; a pelagic (open-ocean) aeolid nudibranch; a marine opisthobranch gastropod mollusc in the family Glaucidae. This species is closely related to Glaucus atlanticus, and is part of a species complex (Informal clade Marginatus) along with Glaucus bennettae, Glaucus thompsoni, and Glaucus mcfarlanei. Like Glaucus atlanticus, it is commonly known as a blue dragon.