This microbe is a tiny, true animal. The name rotifer is from Latin meaning 
"wheel bearer". The two wheels on
rotifers are made of cilia that beat and create a current that draws water containing food into the gut of the rotifer.
These live mainly in freshwater, in bogs, lakes, and rivers, although some inhabit seas and damp soil. There are about 2000 species of rotifers. Rotifers eat bacteria, protists, and other small animals.