Yellow tangs are herbivores, but probably will take some meaty foods, which isnt really good, because theyll probably lose some of its color since, it isnt natural for them.SO, I fed mine Purple Seaweed,Flakes,lettuce, spirulina, and mostly anything I fed it I would let soak in a vitamin formula(ZOE,Vita-Chem,Selcon,etc.)
HTH =D