This is just all i know
Asian Arowana:
Adult Size:Centipede,Frog,Big Earth Worm,Super Worm,Market Prawn,Pellets,Meal Worm,Feeders(Not Recommended),Cricket,Krills,bloodworm,Beef Heart
Mid Size:Centipede,Frog,Earth Worm,Super Worm,Market Prawn,Pellets,Meal Worm,Feeders(Not Recommended),Cricket,Krills,bloodworm,Beef Heart
Baby Size:bloodworms,guppys(not to much),small pellets,cut up mealworm,small cricket
Black/Silver Arowana:
Adult Size: Meal,Super,Blood,Earth Worm,Beef Heart,Krills,Pellets,Rats,Feeder(not recommended),Crickets,Market Prawn
Mid Size:Same As Adult but baby rats
Baby Size:blood worm,small cricket,guppy,small pellets,cut up worm
Australian Arowana:same as black/silver
Adult Size:same as black/silver
MidSize:same as black/silver
Baby Size:same as black/silver
African Arowana:
Adult Size:Meal,Super,Blood,Earth,black worm,krills,pellets,market prawn,possibley feeders(not recommended)
Mid Size:Same as Adult Size
Baby Size:blood/black worm