Hi all,

Just did my annual post- winter clean and inspection on my pond that is shared between koi and goldfish. I found this guy waiting for me:
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Any idea what it is for sure before I try to treat? Mid-summer last year I had a ich battle in the pond and then every thing has been good other than very bad water for a week due to deer and dogs knocking some planters into it and throwing the balance off. The cleaning pulled a large amount of biological matter out and sand/gravel due to spilled pots from my planting shelf. I was doing daily partial changes for the week until I could drain it over the weekend.

No other fish are showing any visible symptoms and this guy is now in a quarantine tank.