Thanks Paul, will be looking for some tomorrow - hopefully someone local has some tucked away somewhere. It came in on a new fish introduced last weekend and it was only tonight that I realized what I was seeing. I'm a little ticked at myself because I noticed it a few days ago but wrote it off as abrasions or scratches since there's always a bit of a "hazing" from the existing tank members when a new guy comes along. Plus it is a light coloured fish so the flesh is the same colour as the flatworms so you really have to see them in just the right viewing angle to make out that they are indeed little raised spots. And it explains the incessant scratching and head shaking I've been seeing from this guy.

I just hope it's not too late.