It’s not copepods, they don’t move. It looks almost like eggs?? Maybe once a month these pop up. I do have a bonded pair of clowns but I can’t tell if these are their eggs that just got blown around or what. I have to scrape them off the glass to remove. But they do flutter in the flow. My clowns normally lay eggs in a hole on top of one of the rocks. And they just let the hermit crabs and shrimp get them