Dale, that is the mature adult colouration of the Rainbow. They start off sort off silver and black. Come to that, the Sajica look very similar until they start developing colour. The Nic pictured is not showing adult colouration either

That would be the answer then. Mine is a mix of dull browns with the dark bands. I'm still dubious whether it is actually a true Sajica or maybe just a result of bad breeding as I've had him a while now and he's never coloured up or been quite right in general really. Yes, recognised the Nic. Have a female also, fantastic colours. Annoying chasers though