Pond Life Identification

Hello! I've had my little bucket pond for a while and everything seems to be quite settled, just trying to identify a creature in it (see picture).
They are very small (less than a pin head size), jet about a fair bit, and don't seem too much of a bother to the plants in the water, just curious to tell what it is. The closest thing I've come across is a daphnia but I'm not convinced it's that...
Any thoughts?
James
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Hi James. Difficult to tell from your picture but they could be either daphnia as you state or cyclops.
Look more like Ostracods. These have a smooth swimming motion - Daphnia & Cyclops move in little jumps.
I think Ostracods is it! Now I can read up on them and find out what they do..
Thank you both for your replies