Help with Koi changing colors
I have a black & orange Koi about 18in long which has started to get white areas on its body. The white is on the fins, around & up the gills & above the eyes. I know that Koi can change colors but is this normal. He appears to be fine...eating & swiming OK. The areas don't appear to be raised. Can anyone help? My other fish are fine in the pond.