I have the twin Bichirs and ropefish together in a 30 gal tank.. i am not totally familiar with Bichir personality but these two do not act like the last bichir i had that died from hitting into a sharp object.. these seem lathargic and do not eat with a passion like my other guy did.. i have checked and double checked water.. did water changes, and every thing tests out fine including temperture.. could it be a possibility that the bichirs are intimidated by the rope fish..he is about 8 inches long..and the bichirs are maybe 3 inches... before i move him out i thought i would see what everyone thinks..thanks