i dont have anytank mates with him i tried out a small severum and the severum ate his front arm almost completly off. and i had a foot long shovel nose in ther for about an hour untill they started squaring up on eachoth ive never seen anything like it. id really like to get some tank mates. it seems like people have good luck with chichlids with lungfish but i think mine might be too slow to defend itsself