Hi Robyn-

Now that my fish are active and feeding, I am able to get a good look at them. I noticed tht my yellow metallic ogon Koi has, what I can describe as orange spots on him/her. They are not red or ulcerous looking. He/she is swimming,socializing and eating well. All the other fish look great. Could these be "age spots"? This Koi is almost 12" and the smaller of the two I have. It has been in the pond since last spring.

Any thoughts? :blink:

My white koi has black spots on him, not the tiny ones indicative of disease, but larger ones that come and go. I don't worry about it too much. It could be from an injury or perhaps carp pox which is a virus that doesn't harm the fish. Your koi's spots are orange which may just be a variation in the scales, just as goldfish change color, so can koi. If your Ogon is not completely "purebred," he/she is more apt to have other colors appear. As long as the spots look just like a color change (not enlarged, bleeding, fungused, infected, bumpy, lumpy, etc.), I wouldn't worry.