The fish will jump from aquarium or bang its head to death, happen if someone offer good price but owner dont let go ...My uncle had this silver arowana few year ago and his cousin offered good price on the fish but wont sell, later in evening the fish bang its head to death ( also jumping but tank are tightly covered)..this also happen to me, and i also have heared few cases...one way to avoid this is by giving 1 piece of your aro scale to the person if u dont want to sell (thats wat i heard)...question is, what do u all think..has any had this experience?personally for me its hard to believe..