Those do look like RK to me as well. When I went to the Atlanta Aquarium, they still hadnt started the behind the scenes tours...looks like I have a trip to go on...
I wouldnt doubt that they are RK. The Atlanta Aquarium gave em the overall impression of just having visited a 'Petco' or 'Petsmart'. Everything was very 'slapped together' without the thoughts of what was best for the fish. The Atlanta Aquarium is a commercial venture, not a research aquarium like so many others (Monterrey, Baltimore, Shedd, etc.) that are doing propigation and research...not just show.