Micractinium

About

Micractinium is a genus of microscopic green algae in the family Chlorellaceae. Species of the genus Micractinium are found as phytoplankton, and are commonly found in freshwater habitats around the world. A few species are found as endosymbionts of ciliates. There is increasing interest in Micractinium due to its high growth rate and lipid production.

Summary from Wikipedia