BCC - anacondas can be much more aggresive than the general rep. of a BCC- though they are both giant snakes and cannot be handled ... or rather should never be handled by one person alone. While the yellows are generally calmer than the greens (I think that's what I read) BCC's tend to be less agressive in general. Personally, I will never have either unless I have the money and staff to start a herp rescue like Rusty does. and even then I would never buy them from a breeder but resuce them from owners lacking foresight.