This is the ditch #scum I'm talking about. 2nd photo is made 8 hours later. The differences are minute. Some patches have connected. These #Oscillatoria glide around forming mats on the bottom of ditches and start to float when they produce oxygen bubbles trapped within the patch.
#cyanobacteria

Big cilliate and a smaller one

Oscillatoria is a filamentous cyanobacteria that glides (motile) It forms dark floating scum

Scooping scum out of a ditch is fun! It looks like a sewer has discharged and fecal matter floats, but it's not. It's mostly #cyanobacteria and full of life. The big #ciliate has ingested #Oscillatoria #microscope