Maricultured are tough. Ideally you're buying them only after they've been in the seller's tank for at least 6+ weeks. But if you find established healthy ones you can end up with some amazing pieces.
I have 3 maricultured millies I've had for a long time that I now frag to sell pieces. They are pretty awesome and unique.
Just look at the base the colony is mounted on. Dead giveaway, no pun intended. I've actually been the benefactor of an Adam piece he couldn't get to color up and he sold it to me for very little. It was a nice light turd colored table and I thought Adam got the best of me lol. It took two years but that bad boy delivered. Nothing better then getting an attaboy from Adam Most don't turn out this well unfortunately