I just read this:
It sounds similar because I looked at the end of the mollie's fins (which should be all black) and they are white!...but the inside of the gills being white is just weird.
Another thing I noticed...he always seems to be trying to stick his tongue out (figure of speech).
The gills (the inside) of my mollie are basically completely white. I do not think it is Ick because everything I have read about ick does not really match what is happening here. He also had (at one point) a white ring around the top half of his eye (like a half moon). That seems to be...