Yes and I feel the same. Especially when none of the other fish show signs, are eating well and just look healthy in general. It's just the crosshatch so if anything I'd remove him and treat alone but I'm scared that if its not flukes it is just stress from all the recent events I'm going to make things worse which is why I'd like at least a second opinion if not third that it may still be flukes and I'll get him out and treat. Otherwise wait.