Species Images
Washed up on Henderson Bay, Far North. Photo 3001222. 30mm. Reproduced courtesy of inaturalist.nz ©tangatawhenua
Washed up on Henderson Bay, Far North. Photo 3001219. 30mm. Reproduced courtesy of inaturalist.nz ©tangatawhenua
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Key to Geographical Ranges
The symbols K.A.C.F.M.An. are used to indicate the geographical range of the species. They have been adopted to give an approxomation of the range of each species within New Zealand.
Kermadec Islands
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
Cookian - Lower North Island and the northern part of the South Island
Forsterian - Otago, Fiordland and Stewart Island
Moriorian - Chatham Islands, Pitt Island
Antipodean - Subantarctic Islands of New Zealand
FW =
L =
E =
I =

Glaucus atlanticus Forster, 1777

Classification:Mollusca (Phylum) > Gastropoda (Class) > Heterobranchia (Subclass) > Nudibranchia (Order) > Aeolidioidea (Superfamily) > Glaucidae (Family) > Glaucus (Genus)
Size/Grows to:Length 40mm (animal)
Distribution:Pelagic. Washed ashore Hauraki Gulf, Muriwai Beach and Far North
Geographical Range:[A]
Sea Swallow
References and Publications:
  • Morley, M.S., Hayward, B.W. 2015: Intertidal records of 'sea slugs' (nudibranchs and allied opisthobranch gastropods) from northern North Island, New Zealand, Records of the Auckland Institute and Museum, 50 (p.77)
  • Churchill, C.K., Valdés, Á., Foighil, D.Ó. 2014: Molecular and morphological systematics of neustonic nudibranchs (Mollusca : Gastropoda :Glaucidae :Glaucus), with descriptions of three new cryptic species, Invertebrate Systematics, 28 (p.174)
  • Powell, A.W.B. 1979: New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.290)
  • Hole, D.M. Feb/1975: Seaborne Treasures, Matai Bay, Poirieria, 7(6) (p.115)

Note: Localities are approximate, and represent only some of the known localities for the species.