I moved all of my fish from the pond into a heated quarantine tank in the garage a week ago, to perform a shotgun treatment to prepare the fish for Spring.
Today I noticed a black smudge on the head of my creme-colored Ogon. It also had a bit of redness on it's left pectoral fin.
I pulled the fish out, and to my horror I find this on the right side of it's body...
Hard to tell in the pictures but the scales on the big red area is raised. The throat area is also red, like a rash.
Is my fish getting eaten alive by parasites or is it an ulcer in-the-making?
......Prior to moving the herd into the quarantine, this fish had been flashing for some time in the pond, along with it clamping it's left pec occasionally.
After a scrape & scope, we found a single piece of trichodina.
So far the QT tank has received about 5 shots of Proform-C(4 consecutive days + 1 after 5 days of Hikari Prazipro) at 78F.
A lot of the fish were flashing after I dosed the tank with Prazi, but none of the others show similar symptoms to this Ogon.
Can trichodina and/or other parasites cause this? I don't think I saw anything like worms or lice.
Or is this a simple injury caused from the flashing?