I had two Siamese fighting fish in a 10 gallon tank with a huge goldfish and some gourami's. They didn't fight to the death, but were amusing to watch when they interacted. They puff up their gills and get mad at each other. But I rarely saw them attack each other. They both seemed to like being away from each other though.
"We will not tire, we will not falter, and we will not fail"-W2
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