im going to take a stab and say that your last image of the peacock is the same species but as is mine atm, is probably just going through is change. they start off looking bland and colourless befor they begin to brighten up. i also have a firefin who is beggining to colour up but they both look much like yours and i also have a fully colourd one like the one your trying to id although i think its different because its fins are all yellow without the extra blue yours have.