Coleps is a genus of predatory ciliates that feed on bacteria, algae, other protists (dead and alive) as well as animal and plant tissues. Here you can see one Coleps specimen feeding on what I believe is a rotifer egg. If you look closely you can follow the path of egg particles making their way to a digestive vacuole inside the Coleps. Interestingly around the 0:15 mark you can also see the calcium carbonate scales that form Coleps' armour.

Technical details:
Differential interference contrast with a 25x/0,65 Planapo objective, 2x Optovar magnification on a Zeiss Phomi III microscope. Camera is Canon 50D configured for afocal projection with 40 mm pancake lens coupled to a 10x/18 Kpl-W eyepiece.

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