black dots on fish

So I’m new to the reef hobby, I recently picked up some new corals torches and a anemone, I had 2 fish and they both had black dots and I figured it was just them getting stung but yesterday I came home to one of my clowns in the corner dead so now I’m a bit worried anyone know what it is? I...

Hi guys, my baby yellow tang has been there in my qt for a week now, I used ich-x to treat it and today I found these black dots on it, could you plz help me to id these black dots? Are these kinds of parasites? Any advice on it? Big thx!