Majestic Angel stop eating, please help!

[yepreef]

So i bought this majestic angel from local fish store.
Day 1 did not eat, day 2 did not eat, day 3 started eating till day 7., i fed them pellets, frozen ls, mysis with garlic. He is now stop eating whatever food i feed. He shows no sign of parasites, the purple tang in same tang is just fine.
Please help! Thanks

 

[Big G]

Beautiful fish! From Advanced Aquarist Magazine:"Majestic Angelfish are generally not picky eaters but can sometimes be difficult to get started eating in the aquarium, especially larger adults. If necessary, use live brine shrimp on a temporary basis to entice them to eat. Frozen Mysis shrimp may also stimulate their appetites and makes a good staple food. Clams on the half shell are very tempting, as well as red macroalgae secured by a clip or attached by rubberband to a rock. Angelfish are used to eating sponges and other encrusting invertebrates, so this is a nutritious and natural-appearing food item."

Here's the whole article link: https://www.advancedaquarist.com/2005/7/fish