The most aggressive I have owned is a flower horn it was highper agressive I had to get rid of it after it killed a few tankmates. Then the female dovii was my second most aggressive after that my bipolar male red terror then grammode and red tiger mota.
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Meanest I've personally owned, Haitiensis and I've owned Dovii and Umbee and between those two the Dovii would demolish the Umbees I've had, both were 5lbs each.