Well i learned the hard way about keeping bichirs with other fish. I had read many posts of them basically being peaceful unless they have bite size tankmates. Well after a few weeks this seemed to be their general behavior. Well four days ago my baby Tig.. about 6 inches.. was swimming funny... I thought he was going through the Tig die for no reason syndrome because up until then he was very active eating black worms and shrimp. BTW he was in a tank with a short body albino.. two delhezis and one ornate all about his size or a little smaller. Well the next day I saw the Tig swim up into a decoration that the ornate always chilled in. I saw the Tig thrashing violently about and when he finally came out he had a bite on his gills and one on his face.. His barbels ? were shredded... Well I moved all the bichirs out and thought he would be ok.. I woke up today three days later to him on his side dead... Bichirs are not to be trusted.. I know I should probably have a small Tig in it's own tank. I am tempted to throw them in with the Fahaka but I won't....