So i am planning on getting a 11" xingu I pike. I have a 125gal i could keep him in for a bit with a 7" wolf fish, 8" ornate bichir, 6" arowana. But i also have a 140gal planted with 5 red bellies (4") and 2 golds (3"). Do you think they would leave him be because he is so much bigger? anyone have experience with these pike? can they defend themselves?