Chris-I'm not sure that his behavior is from starvation but as for feeding yellow tangs, what I have heard and read is that they are natural grazers. They like to eat all day. Do you offer it seaweed for it to graze on? Do you have alot of algae in the tank for it to eat? Just some thoughts on their natural eating behaviors but not sure that is why he woud've been acting like that. Sorry, couldn't be of any help but glad he is doing better.