Paramecium

I'm taking another blind shot at this, but this creature I've regularly seen under freshwater slides -- must be Paramecium.
Paramecium


Paramecium
From Aids to the Recognition of Fresh-Water Algae, Invertebrates, and Fishes

In school I was taught Paramecium had the shape of a "shoe," and this creature does at times while its on the move.
Paramecium

But its an oval-shaped creature, sitting still. There are many species of Paramecium, and after weeks of observing this particular creature I believe this is one of them. (Some videos vary in quality, depending on the settings).
Paramecium Video #1, Paramecium Video #2, Paramecium Video #3, Paramecium Video #4, Paramecium Video #5, Paramecium Video #6, Paramecium Video #7, Paramecium Video #8 (Not sure, but it appears it has a Cosmarium, a desmid floating along inside that it may have swallowed) and Paramecium Video #9
Paramecium

When I first began photographing this paramecium, I noticed it had what appeared to be a noticeably bright red-orange spot in it. Turned out, it was simply a microbe stuck to its underside and was sliding along with it. It later became detached.
Microbe

Microbe

Paramecium

Paramecium

To give an indication to scale, this image was taken at 40x magnification and the paramecium is in the center of the oval
Paramecium

Paramecium
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