cryoplankton

cryoplankton

(ˌkraɪəʊˈplæŋktən)
n
(Biology) minute organisms, esp algae, living in ice, snow, or icy water

cry•o•plank•ton

(ˌkraɪ oʊˈplæŋk tən)

n.
plankton that live in the icy waters and meltwaters of glacial or polar areas.
[1930–35]