i've found bleheris to be very docile actually, very rarely do i see the any flaring or bickering amongst them and even when they do, it ends pretty quickly.
Oh I guess I thought that since they're Snakeheads that they must be mean. We can't own them in the U.S. since it's too warm in most of the States and they could thrive here. If they were legal here I'd buy some of those guys cause they have nice colors and they're cute little buggers!