I have a Labeo calbasu. So far it has turned out to be on the more aggressive end of the scale for labeos. It was quite a bully when in a tank fo smaller fish, giving the labeo parvus some grief. However, now that it is in with the big sharks, it pretty much keeps itself to itself. That may well change as it piles on the inches. I opted not to go for a rohita as a 2 meter fish is too big even for my tastes.