As above, i reckon there is definately boesemani genes in that fish, but I am also equally as certain that is a hybrid fish.
If you want that kind of colour then look for Melanotaenia boesemani.
Some LFS (in UK) have been getting better at supplying what at least look like genuine species, but you need to get familiar with what the pure bred forms look like. Even then you are not 100% guaranteed, unless they can provide you with more detail of where they have come from.
I have M.boesmani "Lake Aitinjo" from an LFS (via indonesian supplier) aswell as from a breeder when travelling to europe. They both look good, but the line bred fish have a stronger darker colour, so I am going to breed from them instead. The fry of these fish are one of the slowest growing, so maybe at the end of the year I may have some surplus boesmani.