There's an eye-ring color thing that's used by many people - orange in percs, dark in ocellaris. After looking at a LOT of pictures and my own fish, I can "see" it. So the "black" fish above looks like an ocellaris, and in ocellaris there is the regular orange nemo, the "black" from Darwin which is ALL BLACK, as well as misbars, nakeds etc.
The fish you pictured above is actually rather peculiar. At first glance it looks entirely very similar to an "Onyx" Percula, yet to me, it clearly screams ocellaris. No one I'm aware of has come to the table with a definitive hybrid of the normal orange Ocellaris crossed with the Black Darwin Ocellaris, but that certainly could be what you have if I were to simply imagine what that cross might look like (although for the record, I have been told by breeders, again no pictures, but told that Black X reg produces basically all regs, yet have read otherwise). Confound that with the rather "curious" case of my "Halfblack" Ocellaris (see image links below)
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(BTW, I'm having trouble visiting those links myself...seems they won't open the first time, but then refreshing the new window seems to make the page load)
Now, in this case, the "halfblacks" are actually the Black Ocellaris (Darwin Ocellaris) that had not developed their full black AND had been fed a diet high in astaxanthin (red pigment). We though they may have been genetic mutations, but after 2-3 months in my SPS reef tank they were fully black and went on to recently start breeding (I returned them to the original owner as I already have a pair of blacks). Your clown is clearly NOT a "black" that hasn't fully colored, and the tipoff for me is that my blacks did not develop the black dorsal margin coloration whereas yours has.
So my opinion, and it's only an opinion, is that you either have a really interesting color variation / mutation on your hands, or you possibly have a hybrid between the two most common varieties of
Amphiprion ocellaris. There's another possibility too, you could actually have a "Percularis" on your hands (ocellaris X percula).
