They almost always come in eating live food only, so it's important to get him eating right away by offering him live ghost shrimp. These guys will pass the point of no return and never eat and die. Personally I don't concern myself with "training" my lions to dead food, so doing more research on this matter may benefit you.
I've found these guys thrive best when given live foods on a regular basis. mine does take dead food but I maintain their main diet live gut loaded ghosties and occasional mollies. My zebra isn't a big fish fan, but my fu love mollies and guppies. It gives them enrichment; being predators in captivity, they really do need the hunt.
A live diet will encourage a more active display, as their tank becomes a hunting ground. My lions are always cruising, very active, and have room to roam. If you keep them in a smaller tank, say anything less than a 55g; and feed them a dead only diet, they will not be that active. And likely won't live that long.
Horrible vid quality but this is my 90g lion's reef, although the lion's will perch and hang a bit of their day away. I could never be in my office more than a 1/2 hour without witnessing a display like this.
