Protozoa
Protozoa were simple microorganisms comprised of a single . There were many variations of protozoa – for example, some moved through the act of flagellation, and some contained no nuclei. ()

The space-dwelling lifeforms encountered by the  in 2371 reminded Captain Kathryn Janeway of protozoa due to the way they propelled themselves through space. ()

External link
 

de: Protozoen
Microorganisms