What is this creature

[Mist]

Hi everyone I have a tank that has been set up for a few years now I have 2 nerites and 2 platys that have had live young. I noticed today whilst checking the tank a small creature that is swimming around the bogwood any ideas what this is will this harm my fish thankyou. Didn't really know where to put this sorry if I am in the wrong thread thx all. I will upload a picture also.

 

[SnailPocalypse]

Copepods I think.They dont harm fish.Actually baby fish eat them I think.