Feeding issue plz help
 

Hello, I had just recenly purchased an african butterfly fish. It has now been almost 4 days since I have had him. I am havng a problem getting him to eat. I have tried flakes, pellets, and also live food. I'm not sure how much longer he will go without eating. Maybe he is eating but I have yet to really see it. Last night i did drop some flakes above him and he jumped at it. Im not sure if he got anything down, but he did attack the food. Not sure if he was just attacking in anger, but im having a real problem trying to get him to eat. Does anyone have any tips?

I had tried a couple times with crickets, but no interest. Going to try blood worms once i get home from work. Any ideas?