While I was looking around...remembered that Zebrasoma flavescens is NOT the ONLY totally yellow representative in it's genus.
Zebrasoma scopas(brown,sailfin,2tone) can exhibit the zonation, or mottling, or even be totally yellow.
I've even seen pix of YELLOW Japanese Zebrasoma, seine netted, which weren't "Hawaiian Yellow Tangs"..and also seen Z flavescens which were mottled, white, darkbrown, and I hear black individuals exist as well.
Ponder this one...STUNNING FISH!
Owner: Greg Schiemer, USA...longtime, successful reef aquarist.
It is similar, in appearance...but is a Z scopas!
I've followed Acropora house's development, etc, as it's been published...
Yeah that's the "L" shaped tank, SPS dominated...fuels a frag "business"...A few fish , incl Gobiodon spp, have completed their lifecyle, and babies grew IN the sytem without additional special care!!!
ANOTHER cool tank addition!
Andrew Caine, of AquaWorld UK, was kinda instrumental in the foundation, establishment...maybe the fish is from him?
Remember Cerven, a yellowtang viewed thru the side of a glass of guinness looks like that too! LOL
Have a lekker nite out!