..... im making a new tank for my snakehead now.... i asked this question to see if there could be any chance of them co- existing together.. i have a blue crayfish with 3 discus... many told that i could not keep them together... bt after a couple of months they found peace and its rather strange that they even seem to eat together... my crayfish would try to catch my loaches but does nothing to discus at all.. its been over 1 year now... maybe its because i introduced the crayfish when it was just a juvenile one..oh well.. thanks a load for everyones help...