Any member of the genus Glaucus of nudibranchiate mollusks, found in the warmer latitudes, swimming in the open sea, strikingly colored with blue and silvery white.
Citrus glauca, the desert lime, a thorny shrub species endemic to semi-arid regions of Australia.
A mollusc of genus Glaucus.
The common tern (Sterna hirundo).
The storm petrel.