If they 'grow' one it means that they aren't wearing it down enough or they're getting too much protein, the fact that he doesn't have excess growth is a good thing. Certain species (like snappers) have a more pronounced one, if that's what you mean
Ah thanks both, that's really helpful! His face is still smooth and was just wondering how it compared but now I understand! I thought it was an age thing until now, he loves his cuttlebone that's for sure
set your food on a rough rock.. that's what I do.. I watch my guy eat and almost every other bite he's inadvertently biting into the rock and thereby wearing down and potential beak growth... my guy is 4 and no beak at all