Clione antarctica
Clione antarctica is a species of "sea angel", a sea slug, a pelagic marine gastropod mollusk in the family Clionidae, the "sea angels". Distribution 
The distribution of Clione antarctica is within the Southern Hemisphere, in the polar waters of Antarctica. Description 
The body length of this species is . Ecology 
Clione antarctica is an important component of polar ecosystems. It preys upon Limacina antarctica It is itself eaten by the medusa Diplulmaris antarctica. C. antarctica has a large lipid storage capacity: up to 5% of its wet mass. It is able to survive without food for about six months by utilizing these lipid storage reserves. Clione antarctica lays eggs in the spring. This species defends itself from predators by synthesizing an ichthyodeterrent (a chemical that deters fishes); this is a previously unknown molecule called pteroenone. The sea angel acts as a "guest" for the hyperiid amphipod Hyperiella dilatata, which takes advantage of the protection provided by the gastropod's icthyodeterrent. References

External links 
 Bryan P. J., Yoshida W. Y., McClintock J. B. & Baker B. J. (1995). "Ecological role for pteroenone, a novel antifeedant from the conspicuous antarctic pteropod Clione antarctica (Gymnosomata: Gastropoda)". Marine Biology 122: 271-277. Gilmer R. W. & Lalli C. M. (1990). "Bipolar variation in Clione, a gymnosomatous pteropod". Am. Malacol. Union Bull. 8(1): 67-75. Clionidae
Gastropods described in 1902