Mine has a taste of the fish flakes but is not overly fussed by them, he much prefers his micro pellets, live mozzie wrigglers, defrosted blood worms he eats but not overly fussed, he enjoyed his defrosted and rinsed brine shrimp, my old one used to eat newly born guppy fry and my new boy I am sure has been feasting on my baby cherry shrimp. A fighter I had years ago was also partial to ants eggs. So yes a varied diet is best for them but then I try to give all my pets and myself variety who wants to eat the same thing day in and day out forever?.