Well i guess i am part of the "my arowana jumped out and killed himself" club now. sadly, when i woke up this morning to turn all the lights on in my tanks before i went to work i noticed my arowana missing from the 125. Well sure enough, he had jumped from the back slot of the tank, which was no more than like 5 inches long, and was the only thing uncovered. He was about 15" and i had grown him up from about 6".