Can anyone let me know if algae growing on fish is detrimental or if it
often occurs following winter?

I have two blue orfe who have some algae / blanket weed which seems to have
attached them. My other fish; koi, Goldfish, comets, shubunkins, golden orfe
remain unaffected. The fish look healthy otherwise. I have only just begum
feeding wheatgerm to the fish. the pond is more or less clear water with
some short blanket weed on th esides only. my pond is located in Scotland.

regards john