Mine is currently my oldest fish, well over the 5 year mark now.
Was a model citizen for about 3 years then started noticing some issues with aggression. Will leave other fish alone only if they are able to stand up to the bullying or able to fight back. Ie. if he's injured in a backlash attach, that will cause him to respect the peace from then on. He has killed a mandarin, completely randomly and without warning, I found the mandarin with his fins chewed off and unable to swim, he succumbed to his injuries within a few hours. I have heard that they can be aggressive like this, as they age, to fish which compete for the same foods (pod hunters particularly), mine seems to fit that pattern. I would only keep them with fish that would be capable to put up a fight in return should they decide to stir up trouble.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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