This is a flast of a cyanbacteria of the Merismopedia species showing cell division. It's interesting that each cluster in the flat is four by four cells and that the directions of the divisions can be at right angles to each other in the same flat.
Swift M3300-D, Swift S-Mirco 40X 0.65, 28mm f3.5 Zuiko relay lens on an Olympus E-420
Stack of 8 images processed in Combine ZP.
Images made through a microscope. All subject types.