This fish is a pretty cool addition to any semi-aggressive tank. I have seen them more and more frequently in the past few months at LFS, and they are even for sale at Petsmarts, though they call them by the ridiculous name of African Bush Fish. A plus about this fish is that they are pretty friendly with anything that can't fit inside its own mouth, and normally doesn't get bothered by anything that can't eat it. However it's probably a good idea to keep one per tank, as they get snippy towards their own kind as they age. I have had my guy for about four months now, and he has already doubled in size. I feed him some pellets, flakes, but mostly chopped up earth worms. As a side note: Earthworms are the best and most underated live food. I have a bichir, 2 angels, 2 yoyos, pictus, betta, 4 Apisto cacatoides, and a tiger salamander. I can feed them all for a week with bucks worth of worms. Anywho, my ctenopoma also has great personality. He rarely spends his time hiding, though he occassionaly visits the pictus in his fortress of solitude made of slate rocks, he's normally floating around the middle of the tank observing the goings-on in my aquatic microcosm. Frequently he is ramming his head up against the glass to get a better look at me just as I'm trying to get a better look at him.
I have a male leopard with an oscar and 2 convict cichlids. They get along great! My oscar and leopard gourami are best budies, swimming around the tank together. I got my oscar when he was smaller than the leopard, but he soon grew much bigger. My leopard's favourite spot in the tank is beside the filter. I wouldn't recommend putting the leopard gourami with large cichlids as they will likely bully it.
This fish is truly striking and is my favorite fish in my tank. I bought it under the name leopard gourami when it was about 3 cm long. It is now more than 10 cm. It has eaten some of my cardinal tetras and otocinclus, but learned to live with them. The vacuum-like mouth is a great force, sucking any small fish/food into it. Truly an amazing fish.
I feel morally compelled to provide an update on my experience. Shortly after I wrote the previous comments, my Ctenopoma acutirostre underwent a sudden growth spurt (it gained over four centimeters in fewer than two months!); it then immediately began harassing its tank mates. Hoping that more territorial space would solve the problem, I moved all fish into a larger tank. The algae eater was then left in peace, but my bush fish continued to harass the glow-light tetras with increasing brutality - even though they were still too big to fit in its mouth! Due to physical signs of stress, I had to put two of the tetras out of their misery; the remaining ones were returned to the store for credit. Missing the bright orange color of the tetras, I purchased a clown loach for the tank - and I'm happy to report that peace has been fully restored. I would also add that this species doesn't require live food to thrive; I've trained mine to eagerly accept small cichlid pellets. However, I would definitely recommend live food at least once every two weeks - mine really gets excited when an earthworm, or spoonful of brine shrimp, gets dropped into its tank.
I have kept a pair of these fish for about five years now. They are truly beautiful fish and incredible to watch. They will darken as they age, blending more with the environment and I find mine to be rather shy. They were sold as African leaf fish. My duo accept frozen brine shrimp, blood worms, and beef heart, as well as flake foods and krill. I feed them before I turn on the lights, and it is fascinating to watch the shadows gliding in the water. Fellow inhabitants include a brown knife fish and a synodontis catfish. All in all, one of my favorite tanks.
I am currently keeping a 3 cm Ctenopoma with a Polypterus senegalus, Platydoras costatus, and an albino Chitala ornata. So far the compatability has been excellent. I've got them in a 200 L, they all seem to scope out their own hide spots except for the raphael cat. He noses into everybody's business but they don't mind. The Ctenopoma hides in the roots of a dracena plant that I accidently broke off and placed in my aquarium to take root, he hides in there and assumes the vertical position, he is accepting the tiniest guppies, and is taking baby snails off of the leaves that hang into the aquarium.