Ornate Cowfish. Australian species. Be careful they can release toxins when stressed killing everything in the tank (including itself) and Cowfish can be ich magnets too. Nice looking fish though. Where did you get it?
They get to 6”.
Are you really Austin? How’s Thailand treating you? I see they have some fish that I’ve not seen either in North American or Chinese (I am a Chinese hobbyist and watch your videos) stores.