Very fast and strong swimmers, also jumpers. Mine aren't very aggressive, in fact my SAE occasionally chases them around. Definately recommend a 75g+ long tank as they can grow quite big, already have a few 6" and they're still growing.
I tell you what I would love to have a tank with a ton of these as they are schooling fish, but i cant afford to keep them in the numbers they need to be kept at the prices i have seen!!!!!!!