Tough fish to fatten up. I've had mine 2 years now, he's definitely grown but is still the fussiest fish I've ever kept. I too subscribe to the Emilyb school of animal husbandry and wide fish
I feed mine mysis every day (because at least he'll eat it), aiptasia whenever I can move some over from another tank, and at least once or twice every 2 weeks or so a full shellfish of some kind (oyster, mussel, clam, whatever). He goes nuts for those although so does everyone else. I'm sure I'm doing a number on my bioload but what can you do... Hard to argue against that wide fish are long-living fish.
Marie yours does look pretty wide comparatively, at least.
