A carnivore, the Jardini Arowana will feed on small fish, insects, and larvae,as well as freeze-dried ocean plankton or krill.
This was pulled from www.liveaquaria.com
In wild, their food consist mainly of insects, fishes, shrimp, worms and small amphibians. Arowana prefer live foods although they can be trained to accept other foods. Variety in food is a MUST to avoid nutritional deficiency. Live foods is generally more nutritious then its counterpart. However, the risk of introducing any disease into the tank is increased when live foods are used.
This was pulled from www.aquascapeonline.com