brums have a very strong feeding reflex, this should not be confused for agression. some burms can be pretty hissy but most are reluctant to bite. i haven't personaly dealt with any agressive burms since back in the days when many of them were wild caught juvi's or adults. and even then i would desrcibe most of them as more defensive than agressive. all though i would say it's pretty rare to encounter an aggressive one i'm sure they are some out there and let me tell you a pissed of 15' burm is a handfull to say the least.