my friend had an arapaima. it got too big for his tank, he bought an inflatable pool and lined it with plastic boards inside and wood support on the outside. it eats like a real monster. lab rats, frogs, kittens, chickens...... he met his doom when he tried to snag the hand of my friend's 3 year-old daughter. .... he he he.... my friend"s wife fed that fish to their dog. Ironic. 
