Can anyone tell me what this is? Just noticed this on my black molly today. He is in a 29 gallon tank with 1 other molly, 2 platys, 1 guppy, and 3 angelfish. It has been setup for 6 months now. The tank has a piece of driftwood in it. Water parameters are all good. The spot is white and fuzzy looking. There is only 1 spot on him and it is probably close to 2 mm in size. Other fish are fine. He is currently in a separate quarantine tank that has been treated with just salt and apI stress coat. I don't think it is ich but I'm not sure. Never had to deal with ich before thankfully. Pic is attached below. There is food in there also so that is what is floating in picture. He only has the one fuzzy spot.Any and all opinions would be greatly appreciated. Thanks.