Can anyone identify this protist which crashed my culture of Chlorella vulgaris?

12 May 2020 0 6K Report

My culture of Chlorella vulgaris crashed after seven days and turned yellow. The algae had been grazed upon by a protist which I can't identify.

I include a video of these single celled grazers which I took five days into the run of my photobioreactor.

I'd be interested if anyone could identify them.

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