This picture shows it better...
Thanks for the input - thinkin it's "Head & Lateral Line Erosion" HLLE, no known cure though. I feel sorry for the fish & the guy that has them is really clueless (not having internet to look up stuff would suck). Will pass on these ideas - thanks again everyone!
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Here's what I found about it-
This ailment's initial manifestation is usually the development of small pits around the eye and on the head and adjacent area. As it progresses, the holes grow larger, eventually connecting to become larger lesions, additionally extending back along the fish's lateral line. In advanced cases, the fins and gill covering begin to erode. While this condition is seldom fatal, it can horribly disfigure a once beautiful fish. Minor cases that are stopped can allow a reversion to a normally appearing specimen, but once it has progressed too far, the fish may be permanently scarred.
Even a well cared for tanks occupants can suddenly show signs of this disease, but it's usually caused by poor water quality & poor diet which can cause chronic stress & autoimmune disease -a weakened system makes it easy for fish to contract a viral or fungus infection. Treatments are to Reduce stress, improve nutritional regime, add vitamins and HUFA supplements to the diet, enhance water quality. Possibilities of reversing (curing) are helped by improving these things & exposure to more natural sunlight.
Some fish can live a long time like this - some grow listless & die from starvation :(
I will pass this info on to the owners, just wish I had more positive (like a miracle cure) input for them.