It's a Pecoltia speceis similar to L15. There are several besides L15: L080, L202, just to give a couple of samples.
L134 has more contrast in the pattern, this one is more dull and less sharp transitions. I'm inclined to say that it's not exactly L15 either - but I could be wrong.
The best thing to do is to go to
The peckoltia genus page and try to find the one that looks most like yours - that's also easier than us comparing with just one picture - you probably know what your fish looks like, or can go back and forth looking at the fish and the pictures on the site...
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Mats