Hith = Hole in the head or lateral line disease

And it looks just like yours

And better conditions and diet seem to arrest it and heal up the affected specimen
No big deal. But it does have HITH/Later line. And if it is healing

You are right the scars will go away

This is a GIVEN
Still That UARU is a rare find in home aquaria lately

I've been saving for a PAIR for about 6 mo's

but you know how saving goes LOL