Do you have any medications on hand or any non iodized salt?
It could be ick but looks longer and not cottony .But salt will help but why is the fish laying on his side or was he swimming like that .
Likely Saprolegnia. Treat this fish with an anti-fungal s.uch as Malachite Green in quarantine. Do not treat the whole pond.
The fish has obviously sustained some physical injury.
It could be ick but looks longer and not cottony .But salt will help but why is the fish laying on his side or was he swimming like that .
Quarantine it!
why did you let a blind gold fish with koi?
Easy there @Rajesh - a blind goldfish needs a pond, too.
Goldfish and koi can live in the same pond. This one just got himself into a bit of trouble.
Quarantine it!
why did you let a blind gold fish with koi?
Well, blind doesn't necessarily mean sick. Although in this case the fish has developed an infection, it wasn't necessarily sick when it was put in the pond. And I was just teasing you a bit - I know you weren't trying to be rude.
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