If you check out bettafish.com someone there had posted (just last week) a thread w/ before and after shots of their marbled betta. It's crazy, you wouldn't even recognize the betta afterwards.....doesn't even look anything like it was before.
The pics were posted by people who (mistakenly) bought an aquabid betta that was marbled and later on after a month or so the colors completely changed. Then afterwards the betta didn't look nearly as superb as it did when it was for sale. LOL
Pearling.....it's way overrated.