Limacina helicina
Distribution:
In the Pacific from 25° to 60° N.
Habitat:
Epipelagic. Performs diel vertical migrations in the upper 200 meters.
Size:
0.5 - 3.0 mm
Diet:
Feeds on microplankton.
Predators:
Salmon, whales, seabirds, gymnosomes and ringed seal.
Useful Facts or Characters:
Sinistrally coiled shell lacking a keel. Two separate wings lie dorsal and lateral to the footlobes.
Natural History:
As in many shell-bearing pteropods, the aragonitic shell is sensitive to changes in ocean pH.