Rainbow Goniopora?

[CroMag676]

Goni experts, what do you think? LFS has this guy listed as a "Rainbow Goniopora". They have had it for about a month. It's not a bad-looking goni. but I don't see a lot of rainbow to it. Is it likely that it's just small and will develop more color as it grows or is it likely to stay fairly monochromatic?

 

[Waters]

I personally don't see a lot of difference in Gonis as they get bigger.....I wouldn't think the colors will change that much (unless the conditions that it is currently in are not to its' liking).....but I am no goni expert