On this video, two things looks to me very interesting. First the fact that this Rotifer (?) is attached to a Daphnia (cf. post : Inside the eye of a Daphnia ). The second one is the sort of ball attached to this Rotifer , any idea ?

This Copepode is interestingly covered by what looks to be algae since they are green. I never saw something like this.

I have no idea about this one.. Maybe another Rotifer ?