Peter, they look amazing! They have grown much more than mine. Mine slowed down in growth the minute they went into my community tank. They weren't very happy with their new tankmates for the first month or so.
I only kept two for myself when I shipped you the fish, and like yours, mine are never apart. They always stick together.
From what I was told by the breeder, the orange variant stays a bit smaller than the normal U. amphiacanthoides. He said he only got his wild adults to about 8" or so. Other than their orange belly, there's really not that much difference.
I will say that when they were babies, their patterns were way different than the amphicanthoides I'd had before. They were much lighter in color.
