I was feeding the Aros, one Silver and one Jardini. Both of these fish are small with the Silver about 8" and the Jardini pushing ~4". I was feeding the Carni sticks as I always do first so the Silver will fill up, the Jar doesn't eat them yet. After I fill the Silver I can then feed the meal worms to the Jar, if not the Silver will take them first. So I see the two fish swim up next to each other, flair their gills the Silver coils into an S shape and bang they explode. I few minutes later the same thing, three times and they settled down. As I watched it looked like the Jar was the one that instigated the fight as the Silver at twice it's size has been the dominant fish. It appears the Jar who is now bulking up and growing is starting to see thing differently. I thought I was going to have more time to decide which one to keep. The conundrum is which one to keep, as both have pros and cons. The silver will grow larger but allow other fish in the tank the Jar is worth more, will stay smaller (but as a larger turning radius) but is a virtual wolf in sheep's clothing. The family likes the Silver because it interacts and has more "personality" the Jar only comes around to eat. I thought I was going to have more time.