When i lived with my grandparents, we had a big one. What i remember above all, were those fishes with a huge tail, like if they had bedsheets attached to their butts or something, but really graceful. After only a few days though, the other fish ate almost all of their tails, and they couldn't swim straight anymore. Kinda sad, they died shortly afterwards.
I believe it were mostly those little red and blue Neon tetra's who did that, they swim in large groups and are pretty fast. Maybe i should have punched them like you do.
