Yellow tang with fin issue
I have a yellow tang that I've had for 2 months or so. Medium sized, eats like a pig. Very active but totally non aggressive. Only tang in the 125 gallon 6 foot tank.
Yesterday I see him flashing, oh no, not a flashing tang!!!
So he has no ich spots anywhere, but his left side fin has gone from totally clear to almost a milky color. I don't see spots of ich or anything buy his fin has clearly changed visibly in a day. Anyone know what causes this? After seeing this I inspected all my other fish (2 clowns, blenny, angel, bluejaw trigger and leopard wrasse) and none of them show any signs of anything.
Thoughts on one fin going from clear to a whitish color?