heya!
i'd like to politely offer a different viewpoint on tubs being everyday blues. and again, just a friendly point of view that's a little different is all, no offense intended!
anyone that has seen the colony of original tubs blues at atlantis aquarium i believe will back me up when i say that the tubs blues are indeed incredibly gorgeous and above par from the average blue zoa.
the tubs blues are much more vibrant and stay blue under all spectrums of light from 10K - 20K.
now i'll agree that there are other blue zoas out there just as nice... but IMHO, definetly not the average blue zoa!
just like any zoa, i've seen them morph -- from a pastel sky blue (like the shots tubs typically presents brought to you by high light) to a deep rich blue (like the shots atlantis typically presents brought to you by 'low' light, or at least low in their tank). IMHO, i like the dark morph better. but of course this is purely taste.
and FWIW, the zoas linked on RC look like tubs to me!

(morphed to a shade of blue in the middle of their brightness)
hope this helps!
-WD?