Yes, my new yellow tang is skinny but I had about six to select from. All the tangs were healthy and ate formula two frozen food while I was at the shop.
My only concern is whether I can mix the yellow tang with a mimic tang when I upgrade to a 180g. Although my mimic will turn chocolate as it matures, both fish are yellow which may cause some compatibility problems. Right now, each tang is placed in separate aquariums.