This fish looked completely healthy, was active and eating 6 hours prior to this Pic. It has been in a QT tank about 5 days, since I got it and has not been near my display. Im pretty sure this is internal uronema and this fish is beyond help. Should I euthanize?
There's also 5 more brand new living anthias with no symptoms in the same QT. QT is cycled and theres 0 ammonia.

There's also 5 more brand new living anthias with no symptoms in the same QT. QT is cycled and theres 0 ammonia.

