| Glaucilla marginata | |
|---|---|
| Glaucilla marginata | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Heterobranchia clade Euthyneura clade Nudipleura clade Nudibranchia clade Dexiarchia clade Cladobranchia clade Aeolidida |
| Superfamily: | Aeolidioidea |
| Family: | Glaucidae |
| Genus: | Glaucilla |
| Species: | G. marginata |
| Binomial name | |
| Glaucilla marginata Bergh, 1860 |
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Glaucilla marginata is a species of small, floating, blue sea slug; a pelagic aolid nudibranch; a marine opisthobranch gastropod mollusk in the family Glaucidae.
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This species is pelagic, and like many other pelagic species, it can be found worldwide.
These small nudibranchs float upside down on the surface tension in temperate and tropical seas.
This nudibranch is dark blue, and in many ways it resembles a smaller version of Glaucus atlanticus. However, in this species the cerata (saw teeth on the skin) are arranged in a single row in each arch, while in Glaucilla there are multiple rows.