Sometimes I think, at least in most cases, the lions like to see the food moving. Mine will follow a scallop all the way to the bottom. But once it gets there he just stares at it until the current starts move it which is when he moves in for the "kill." That's why I think hand feeding works well. You get as close as you can, watching out for the obvious, and then drop the food in their sightline. If done right, you will entice him with the movement of the food.
My current project underway
2 overflows wet/dry ETSS skimmer Mag18 pump 2 Stealth Titanium heaters
Dog Face Puffer
Bamboo Cat Shark
and the almighty domino Damsel