Good news. What did you end up treating it with? Just curious as I'm learning about meds etc. I had a fish with a strange white spot too, however he had stopped eating several days before it appeared. A couple days ago I started a treatment of a mild concentration of aquarium salt per a professionals advice. I thought he was on the mend, but I think he's not going to make it. He was such a little cutie. The runt of the group. I'm very sad.Thanks, I spoke to my local fish shop and they thought fungus too, I treated the aquarium and the spot is gone! Thank you