The blueface is very shy at first and for a good while too for when feeding, after you drop little food at any one time, you will need to step far away from the tank and not stand there hoping it will feed. I not know the tank size you have here for as well what other fish inhabitants you may have in with this fish. Maintain however high water quality as well a nutritional diet for the blueface and please, not over crowd, for this will only stress out this fish at an early stage.
Buddy Jingle Bells, Jingle bells, Jingle all the way...................