He does change colour according to the previous owner but i don't see him that much as he's very shy but goes loopy when the lights go out like a different fish.
yeah they are lovely, just seen some at WOW Romsey...I cant remember a price though. also the ones at the shop were lighter but with the same pattern. I like them...nice.
Mine was fully grown at 6" total length. Sexing them isnt easy IMO but I was fairly confident mine was a male. If you look at my pic then you will see lots of hair growth on its pectoral fins which is normally male trait.
Nice 52, 6" isnt un-common 168 stays smaller of the 2.
As for sexing iv found ventril quite reliable, if you can get a belly shot i would be happy to give it ago for you.