white eye

I woke up this morning to the fish being fine and a couple hours later, this had happened to it’s eye. What should I do? The other fish keep trying to eat it

Hello all ! I'm attaching a picture of my friend's jaguar and it's eye getting opaque white slowly.... Can someone suggest what to do ? It's serious matter I think please help what's this & how to cure ?

Yesterday I noticed white dots on my black Platy, however I don't think it's whitespot, because it looks as if it's not on the skin, it's like, hanging on, I don't know. It's eye has a white coat and the white things are as I said, not in the skin, but on it. I looked it up and I found something...

This white spot showed up on my JD this morning. Is this Normal? I can quarentine him and treat him if I need to. Any suggestions?