All eels in my opinion are quite aggressive eaters. I hate to be the bearer of bad news but I believe that any eel that is in a home aquarium has the potential of eating some of your fish. Eels are opportunistic feeders for the most part. I have a 4" black damsel in the tank with my Fimbriated. I put the fish in before the eel, the eel was only 10"-12" inches when I got him and there was no way possible the fish could be eaten by the eel due to the mouth size on the eel. That did not stop the eel from tearing a chunk off the fishes back and another from right below the fishes gills (stress coat and 6-8 weeks in QT nursed the fish back to health). Guess the point of that story is if you own an eel expect that at some point it will try and most likely succeed at either killing or eating its tank mates. Now I'm no expert but the more you read up on eels you will realize they are more suited for a species only tank than a community one. I'm not saying a community can not work, I am saying if it does work for you do not get to comfortable with the situation because the possibility of it going bad is always there. It would only be wise to put fish that are cheap and you do not care to lose (moral aspect set aside) in a tank with an eel. You could try extremely large fish if you have a system appropriate in size to accommodate those type fish, but the risk is still there. Eels are hunters and the fish in the tank with it will sleep at some point.