Most of his diet has been crayfish and apple snails but he does love Bloodworms
Also, I understand that most say Fahaka need to be kept by themselves.
So far my Fahaka has been housed with a Senegal Bichir and a Leopard Bush Fish. No issues so far (although the Fahaka is still young).
If I notice any extreme aggression or damage, I would remove the Bichir and Leopard Bush Fish. That being said, the tank belongs to the Fahaka and if either of the fish end up a meal, I'm ok with it.