Your chances of pairing are good with them that size but I CAUTION you to keep an close eye on them. A clown the size of the large one can really do a number possibly causing a fatailty on one so much smaller. If they are indeed Sebaes then of course the female will have her adult (darker) coloring and the male should have similar (dark) coloring and not have its juvenile (light tan) coloring.
-Ian
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