Cladocera?

[ptychoptera]

Thought I'd share these pics. Anyone willing to confirm the ID and perhaps explain what might be going on in the pictures. Ecdysis? Mating?

Size on the specimen was around 1mm. The greenish spots are the algae growing on my aquarium.

 

[greenbean36191]

These are copepods. The naupliar eye is pretty diagnostic since these aren't nauplii. I can't tell what's going on in the pics.

 

[ptychoptera]

Found another pair of these just now. I wonder if the coloration is some kind of sexual dimorphism?