Here's a few more pics. He is stressed out from being picked on by a larger dat and an azul so he is not that stable currently, but he was fine before they started ganging up on him.
This guy is the rare gentle giant african lungfish. I have had him for about 3 years and he has never hurt anybody; I trust him so much that there's an azul and a 16" tig with him. I actually had to move him from my aggressive tank because he was getting picked on. He won't even eat feeders; only peeled market shrimp or krill.