My silver Arowana was eating perfectly fine (hikari pellets, frozen bloodworms, etc) Then I put in a tiger Oscar and now the aro refuses everything I give him. It's been 2 days and the Oscar is out competing my aro for food and the Oscar spits a lot of food out. The aro jumped and lost some scales because he is afraid of the Oscar but the Oscar isn't aggressive towards him at all. Their in a 125G tank the aro is about 18" and the Oscar is 9"