As for Arowanas, try to look for one with straight eyes. If the upper of the eyes look down or have a eye lid appearance, it because it has been kept in a frightened environment. Arowanas can be spooked easily and will jump out of tank if closely fitted lids aren't kept on tank. Also try to always keep some kind of light on the tank, so they won't spook easily in the dark (nite-lite). I keep a 10-11 inch silver arowana in a 65 Gallon long tank with a Red Tailed Catfish (gotta separate them soon!). All I do to feed them is place feeder fish in the tank. They eat them when they're hungry. As for asian arowana (red arowana), they are very expensive and imported through one person I know from Canada from Asia. Oh, some fish breeder pick small arowanas (3-4 inches), about 3-4, place them in a tank, and let them fend for them selves. In a fewdays to weeks,the strongest arowana will be the last one, this is the one you'll keep. *crazysmiley*