We used to have 3 tfb's all younge, around 3 inches long. One morning when I got up, 2 of them were dead, and the other looked like it had a bloody nose. I couldn't figure out what happened to the 2 that parrished, until we picked up 2 more to replace the 2 we lost. After about 3 days of the new fish being entered into the tank, the original tfb began violently ramming itself relentlesly into the 2 new ones. We witnessed it miss and slam into the tank (hmmm maybe that is how it got the bloody nose). Eventually we had to remove him from the tank or risk losing 2 more peaceful fish. (it also chased after the other fish in the tank). Has anyone seen this type of behaviour in these barbs.