You know, I also have a problem with another Endlicheri of mine. Izzy is an Endlicheri Endlicheri, in a 30g alone with two other bichirs. Izzy measures out at 6'', tankmates being a 5'' mokelembembe and a 5'' palmas polli. She terrorizes them. The moke has learned to stay at the other side of the tank, and the polli lays on the branches of a log far away from her as well. They stay uninjured unless they hang out around her too long.