I have one 12+ inch Polypterus delhezi, one 8 inch Polypterus senegalus and a 20+ inch ropefish in my 125 gallon. They're are some of my favorites. I've even got them eating normal flake food and cichlid pellets.
The delhezi is an aggressive eater, but he only has been for the past 6 months or so. A year ago he was much smaller, and hid a lot. Now he's out all the time and eats like a pig! The ropefish and senegalus are a bit more shy, but I've got them eating the same thing. I give them treats of different meaty foods pretty frequently, though.
I need to take some pictures...