I mentioned in another topic of mine , I have an isolated berried shrimp in a small jar, partial of her eggs were released, the rest were either rot/unfertilised/spoiled whatever you call it and it stuck with her. She decided to shed skin to shoved them off.
I used tweezer to pick her skin and swivel off those rot eggs, a few came off and float on top of water surface. 2 more were too sticky to shake off, I just let it sunk down the gravel bed with their mother skin.
I can now confirm my curiosity, their rot/spoiled/unfertilised eggs do float to the top.
Anyway, my curiosity went to wonder if I could make a closed up on those live living larva. Looks like they were paddling non stop trying to learn how to swim and grab on whatever surface. Here's a few gifs. Look closely on their tiny little swimmeret, they paddling like nobody business
So sorry for the poor quality. This is the closest I could get.