Beautiful emas, exotic variant of Micropeltes. I'm playing Devils advocate as I've witnessed many times micropeltes being kept successfully with large tankmates. Hell, I even have 3 right now with 3 alligator gars in my pond right now. You need to have them grow up with fish to accept tankmates. I've noticed if they are established in there and you introduce new fish, they are very likely to attack it for being foreign.