disease angelfish

Two out of my five angels have these weird wounds, and one of them actually missing a pectoral fin. Anybody able to tell me what’s going on with’em?

Hi guys I have an Angel Fish and recently I noticed these white things on my fish. Immediately I though it must be ich, but I don’t really think it is. There might be a few very faint white spots on the fins, but the main thing you can see is the white stuff coming out of his head. Please help...

I have a very young koi angelfish who has been very healthy. Today though I've noticed he has silver scales under his gills. Is this something I need to be worried about or is it simply him getting his colors finally! Please help! Posted one picture. Will try and get more. He isn't very good at...