Another water flea

Another water flea

Observation - Another water flea - UK and Ireland. Description: Found in freshwater pond in wildlife area next to river Foss. This creature was similar to the observation I've made that I thought was a female cyclops only this one does not have the egg sacs so I'm wondering if it is a male of the same species-? I'

Found in freshwater pond in wildlife area next to river Foss.

This creature was similar to the observation I've made that I thought was a female cyclops only this one does not have the egg sacs so I'm wondering if it is a male of the same species-?
I'm not sure, so any help is appreciated :-)