clownfish spot

[reachjohnnyliu]

Anyone have any idea what this spot is on my clownfish? It's currently in quarantine, but i was about to move it into the display tank. It's been in copper for 30 days and API GC / Seachem Metro for 14 days.

 

[ThRoewer]

If you are lucky it's just a bout of Lymphocystis, a common side effect of copper treatments.