Yellow Finned WCMM

I was out looking for a few more Gold WCMM to add to my 18G and came across 2 that had yellow fins. Pretty unique, I just had to take them home. Does anybody know if this is common? If not, I was hoping I could make a breeding project out of this.

May be worth trying PLUS it’d give you excuses to scour the LFSs of Australia for WCMMs with similar traits.