Bichirs are all about personality, mine don't even try to have a go at anything. My congicus has 2 little rainbow cichlids about 4" that follow him everywhere dithering just above his head and he never tries to eat them. Then again you could get one that would destroy anything that fits in their mouths. I personally don't keep any lapradei as they are one that i think are most likely to eat other little bichirs. Endli's are the king of poly's and really hard to find in the uk so don't turn one down if you get the chance. see the other thread i posted this morning for pics of endli's