This microorganism is probably Nauplius.
I saw them a few times, but they moved so fast that they couldn't be filmed.
This one is particularly lethargic and I was able to get a better look at him.
The lighting technique is DIC PZO.
The video is quite long, but please be patient while watching because from the 2nd minute I allowed myself to do some colorful experiments.
For this purpose, I used the entire available range of modulator modifications.
Only now did I notice how much dirt was stuck in the optics I was using.
It's time to get down to business and clean it all up.
I'm curious what the effects will be.
Regards
Maciej